Presumptions: Legal Rules, Res Judicata and Factual Inferences

Overview

A visitor falls beside a leaking display cabinet. No witness saw water escape, but photographs, maintenance records and observations made immediately after the fall may establish a sequence of events. A presumption (présomption) allows the court to move from established facts to a fact that has not been directly observed. Whether that movement is required by legislation or justified by the evidence determines its legal effect.

The Civil Code of Québec distinguishes a legal presumption from a presumption of fact. The first attaches a consequence to facts identified by legislation; the second results from the court's assessment. Res judicata is a particular absolute legal presumption governing matters already adjudicated. Treating these mechanisms as interchangeable obscures both the proof required to activate them and the response available to the opposing party.

The burden of proof remains the starting point. A presumption of fact provides a way to discharge it through indirect evidence; a legal presumption can dispense with further proof of a specified matter once its conditions exist. The lesson on the burden of proof explains who bears the risk of uncertainty. This lesson applies that distinction to the three branches of the fascicule.

Learning Objectives

• Identify a legal presumption's triggering facts and determine whether contrary evidence is permitted.
• Apply the conditions of res judicata without confusing a prior judgment's binding effect with its evidentiary significance.
• Construct and challenge serious, precise and concordant factual inferences while preserving the civil burden of proof.

Legal presumptions: establish the conditions first

Under art. 2846 CCQ, the consequence runs from a known fact to an unknown fact. Article 2847 CCQ gives a legal presumption its particular force: legislation has already selected the consequence. A party relying on it must identify the provision and prove the facts on which its operation depends. The court does not create an equivalent statutory shortcut merely because direct proof would be difficult.

Separate the application of the presumption from its consequence. If legislation presumes a particular state of affairs for a defined category of persons, first establish that the person belongs to that category and that any temporal or other conditions are satisfied. Dispensation from further proof concerns the presumed matter. It does not establish every element of the claim, erase unrelated defences or make the triggering facts immune from challenge.

Simple and absolute presumptions

A simple presumption can be rebutted by contrary evidence. The word presumed normally signals that result. An absolute presumption, usually signalled by deemed, cannot be rebutted once its conditions are met. These are the interpretive directions in art. 2847 CCQ. The French statutory terms are présumé and réputé respectively.

The difference affects admissibility, not merely persuasive strength. Evidence contradicting an established absolute presumption is inadmissible. Evidence disputing whether its triggering conditions exist raises a different question and must be examined on that basis. For a simple presumption, the applicable statutory regime determines what contrary proof can rebut it; the adjective simple does not guarantee that rebuttal will be easy.

For example, good faith is presumed under art. 2805 CCQ. Article 1015 CCQ presumes equal undivided shares. Neither example authorizes the court to ignore admissible contrary evidence. At the other end of the spectrum, art. 78 CCQ supplies deemed domiciles where the person's domicile cannot be established. The statutory conditions and their sequence matter before the deemed conclusion follows.

The vocabulary must nevertheless be read in its legal context. The source contrasts art. 1632 CCQ, whose presumption concerning an onerous transaction may be rebutted by proof of the third party's good faith, with the absolute presumption concerning a gratuitous transaction in art. 1633 CCQ. Both use réputé. This contrast demonstrates why a word search cannot replace interpretation of the provision and its jurisprudence. The rule of interpretation governs Quebec legislation; it should not automatically be transplanted to federal enactments.

Article 2866 CCQ addresses presumptions which annul acts or deny an action. Contrary evidence is inadmissible where legislation has not reserved it. Its second paragraph provides a narrow opening through an admission made in the proceeding in which a presumption is invoked, where that presumption is not of public order. The exception must be tied to its statutory setting. It is not a general permission to contradict every absolute presumption with any out-of-court statement.

Worked application: unequal shares

Factual Scenario

The following facts are hypothetical. Two people acquire property in indivision. A dispute later arises over their respective shares.

Res judicata: what an earlier judgment settles

Res judicata (autorité de la chose jugée) is an absolute presumption under art. 2848 CCQ. It protects the finality of adjudication and prevents the same dispute from being decided repeatedly. Its application depends on the character and scope of the earlier judgment and on the identities of parties, cause and object.

The presumption does not depend on proving that the earlier judgment was correct. An alleged factual or legal error must be addressed through an available appeal or other authorized recourse. A new action is not an opportunity to retry a concluded dispute with arguments or evidence that could and should have been presented initially. Roberge c. Bolduc, [1991] 1 R.C.S. 374, is among the source's authorities on the stability protected by this rule.

Conditions concerning the judgment

The usual requirements are a definitive judgment, rendered in contentious proceedings by a competent civil or administrative tribunal, deciding the substance of the dispute. Examine these requirements concretely:

• A judgment set aside on appeal or review loses its authority. The source distinguishes authority attaching when judgment is rendered from its suspension during a valid appeal brought within the prescribed time.
• An interlocutory decision normally lacks the necessary final character, but a decision that finally resolves part of the merits can require a different analysis.
• A non-contentious decision generally does not settle a contested right. A proceeding initially non-contentious may, however, produce an adversarial determination of a disputed matter.
• A rejection for a purely technical procedural defect ordinarily differs from a determination of the right claimed. A dismissal that finally disposes of an abusive action cannot simply be treated as permission to commence the same action again.

The competence requirement likewise does not create an unrestricted opportunity to challenge the original court's jurisdiction collaterally. The availability and use of the proper recourse matter. Foreign judgments and arbitral awards have their own recognition requirements, which must be addressed before assuming an equivalent domestic effect.

There are statutory qualifications. Article 563 of the Code of Civil Procedure (CCP) limits the res judicata effect of a small-claims judgment to the parties and the amount claimed. It also prevents reliance on that judgment in a claim between the same parties founded on the same cause before another court; a request or evidence based on it must then be rejected. A transaction has the authority of res judicata between its parties under art. 2633 CCQ, within the matters settled. Matters excluded from the settlement do not acquire that effect simply because they relate to the same broader relationship.

The three identities

Identity of cause concerns the legal foundation of the right asserted, including the facts as legally characterized. Repeating the same factual narrative does not by itself settle the inquiry; changing the name of the remedy does not by itself defeat it. The comparison asks what must be proved to obtain the right claimed. The source uses Rocois Construction Inc. c. Québec Ready Mix Inc., [1990] 2 R.C.S. 440, to explain why legal characterization matters.

Identity of parties is juridical. The parties must act in the same capacities. A person suing personally and the same person representing someone else do not necessarily have the same legal identity. Conversely, legal representation may bind people who were not physically named as litigants. Corporate affiliation, friendship or a shared interest does not establish representation by itself.

Adding or removing a defendant does not automatically free an existing party to relitigate the same adjudicated dispute. Compare the actual legal relationships and claims. Equally, a dismissal against the wrong defendant does not necessarily prevent a claim against the proper one. The identity requirement protects the parties actually concerned; it is not satisfied by superficial resemblance between two proceedings.

Identity of object concerns the immediate juridical benefit sought. Read the substance of the conclusions, not only the form of the proceeding or the amount requested. A dispute may contain several objects, only one of which has already been decided. The rule may prevent reopening that issue without disposing of every new question in the second proceeding.

In a class action, art. 2848 CCQ extends the judgment's effect to group members who have not opted out. The source also distinguishes refusal of authorization because the procedural vehicle or representative is unsuitable from rejection because the proposed right itself is untenable. Whirlpool Canada c. Gaudette, 2018 QCCA 1206, illustrates why the reasons for refusing authorization must be examined before asserting a bar against another application.

Operative conclusions and necessary reasons

The operative part of a judgment normally identifies what has been decided. Reasons inseparably connected with those conclusions may also determine its implicit object. Incidental observations and opinions unnecessary to the outcome do not automatically become binding truths.

In Nasifoglu c. Complexe St-Ambroise inc., 2005 QCCA 559, the source explains that the characterization of a lease could be covered by res judicata even though the later proceeding sought a different immediate remedy. The classification had already been decided in a manner integral to the earlier disposition. That reasoning calls for close reading of the actual judgment; it does not establish that every sentence in earlier reasons binds everyone in later litigation.

If the first proceeding is still pending, the related concept is lis pendens. It also requires attention to the three identities, but there is no completed judgment whose findings can simply be adopted. Abuse of procedure is another distinct basis for controlling repeated litigation. Failure to satisfy strict res judicata conditions therefore does not establish an unconditional entitlement to start the same debate again.

Worked application: a second furniture claim

Factual Scenario

The following facts are hypothetical. A furniture maker sues a customer for the unpaid balance. The court finally decides that the parties agreed to a particular price and dismisses the extra charge. The maker later starts a new proceeding against the same customer, in the same capacity, seeking that identical extra charge under a different procedural label.

Presumptions of fact: build the inference

Article 2849 CCQ leaves presumptions of fact to the court and permits consideration only of those that are serious, precise and concordant. The court moves through three analytical steps: establish the known facts, explain their connection with the disputed fact, and decide whether that fact is proved. Indirect proof remains proof; conjecture about an unproved premise cannot supply its foundation.

The known facts must be established through admissible evidence. A photograph must be properly introduced, a witness's account must meet the rules applicable to testimony, and a document must be usable for its proposed purpose. An inference cannot cleanse inadmissible hearsay or an impermissible attempt to contradict a written juridical act. The lesson on proof contradicting a writing addresses that restriction. An applicable exception, including a commencement of proof, must be established on its own terms.

Serious, precise and concordant

Serious concerns the strength of the connection: the established circumstances must support a substantial inference. Precise concerns its direction: the reasoning must point to the particular disputed fact rather than leave equally plausible opposing conclusions. Concordant concerns consistency: the circumstances considered together must converge rather than cancel one another out. These requirements discipline the inference; counting several weak suspicions does not make them compelling.

The standard remains the balance of probabilities under art. 2804 CCQ. The source's language of reasonable certainty does not introduce scientific certainty or proof beyond a reasonable doubt. A plausible possibility is insufficient. Choosing the strongest item from a list of weak hypotheses also does not necessarily establish that hypothesis as more likely than not in the evidence as a whole.

Explain the connecting reasoning explicitly. Time, location, physical mechanism, continuity of events and the elimination of competing explanations may support it. An elimination process can be persuasive where the evidence actually excludes alternatives. Merely failing to investigate alternatives does not prove their absence.

Fault and causation require separate reasoning

Presumptions can establish fault and causation in extra-contractual liability, but each proposition requires support. An injury following an intervention does not alone establish that the intervention was faulty. This is particularly relevant to medical care: an unfavourable outcome or the occurrence of an inherent risk does not transform an obligation of means into a guarantee of success.

Technical evidence may be necessary to explain why an event would probably not have occurred without fault. When credible expert evidence supports conflicting scientific explanations, the court must assess that conflict; invoking a presumption does not remove it. The source's discussion of St-Jean c. Mercier, [2002] 1 R.C.S. 491, rejects using the realization of a risk to bypass the ordinary proof of causation.

The historical expression res ipsa loquitur should therefore not be used as an independent civil-law presumption of liability. Quebec's analysis proceeds through the Code's presumptions of fact. A proved fault that created a danger, followed by the realization of that danger, may support a factual inference in the circumstances. It does not invariably establish causation or reverse the burden of persuasion.

Worked application: the leaking cabinet

Factual Scenario

The following facts are hypothetical. Assume that a witness saw water extending from a cabinet to the place of the visitor's fall immediately afterward. A properly authenticated photograph confirms the layout. Maintenance records establish a recurring leak in that cabinet, and reliable evidence excludes intervening cleaning or another identified source of water during the relevant period.

Response, burden and appellate review

The burden of persuasion does not shift because a party uses a presumption of fact. Under art. 2803 CCQ, the claimant must still establish the facts supporting the claim. Persuasive circumstantial evidence may create a practical need to respond, but the opponent is not automatically required to identify the true alternative cause of every unexplained event.

Contrary evidence may attack the underlying facts, the connecting inference or the conclusion. Evidence of reasonable care can undermine an inference of fault; evidence of another cause can undermine causation. If the whole record leaves fault and absence of fault equally compatible with what occurred, the claimant has not discharged the ultimate burden.

In Benhaim c. St-Germain, 2016 CSC 48, the Supreme Court confirmed that an adverse inference is discretionary even where the defendant's negligence has impaired the claimant's ability to prove causation. It cannot become an obligatory reversal of the burden. Official judgment.

On appeal, factual findings and inferences generally attract the standard of palpable and overriding error. A reviewing court cannot replace a reasonably supported inference simply because it prefers another. An identifiable error of law is different: relying on inadmissible material or using a presumption to fill an evidentiary void can engage correctness review. The source discusses this distinction through Housen c. Nikolaisen, [2002] 2 R.C.S. 235, and Barrette c. Union canadienne (L’), compagnie d’assurances, 2013 QCCA 1687. Preserve the proof of each premise and the reasons for the inference at trial; appellate disagreement alone will not repair a missing record.

Practice Checklist

• Identify the fact to be proved and the party bearing the ultimate burden.
• For a legal presumption, identify its provision, triggering facts and permitted contrary proof.
• For res judicata, compare the judgment, its scope and the three identities; check any statutory qualification.
• For a factual presumption, separate proved premises, connecting reasoning and conclusion.
• Verify admissibility of every supporting item and confront competing explanations.
• Distinguish a practical need to respond from a reversal of the burden of persuasion.
• On appeal, identify the alleged error and its proper review standard.