Lawson v. Sullivan

Lawson v. Sullivan

The trial judge's finding that Hydro's negligence would have only afforded a one-in-four chance of avoiding the accident does not meet the balance of probabilities required by the but-for test; without causation Hydro cannot be held liable, so the action against Hydro must be dismissed.

Source-derived case information.

Citation
2008 ONCA 700
Parties
Plaintiff: Ken Lawson, Christian Lawson, Megan Lawson and Katie Lawson (by her Litigation Guardian Ken Lawson); Defendant (respondent): Timothy Sullivan; Third Party (appellant): Hydro Ottawa Limited
Court
Court of Appeal for Ontario
Jurisdiction
Canada
Judgment Date
14 October 2008
Procedural Posture
Civil / Appeal From Superior Court Judgment
Outcome
Judgment below set aside insofar as it found Hydro Ottawa liable; action against Hydro Ottawa Limited dismissed.
Legal Topics
Causation, But for Test, Contributory Negligence, Duty to Warn, Costs
Source Language
en
Negligence Civil Procedure Apportionment of Liability Causation But for Test Contributory Negligence Duty to Warn Costs

Source-derived case record

Summary, issues, holding and outcome

More case intelligence is available

Unlock the full research layer for this judgment.

Legal principles 2 Authorities cited 2 Party arguments 2 Amounts and remedies 2
Sign in to unlock

Parties

Ken Lawson, Christian Lawson, Megan Lawson and Katie Lawson (by her Litigation Guardian Ken Lawson)

Plaintiff

Timothy Sullivan

Defendant (respondent)

Hydro Ottawa Limited

Third Party (appellant)

Procedural Posture

Civil / Appeal From Superior Court Judgment

  1. 1 Whether Hydro Ottawa's negligence was a factual cause of the collision under the but-for test
  2. 2 Whether a finding that negligence afforded only a chance of avoidance satisfies balance of probabilities causation
  3. 3 Whether apportionment of fault can be applied absent causation

Ratio Decidendi

The trial judge's finding that Hydro's negligence would have only afforded a one-in-four chance of avoiding the accident does not meet the balance of probabilities required by the but-for test; without causation Hydro cannot be held liable, so the action against Hydro must be dismissed.

Court Disposition

Judgment below set aside insofar as it found Hydro Ottawa liable; action against Hydro Ottawa Limited dismissed.

Orders

  • Set aside the judgment below and dismiss the action against Hydro Ottawa Limited.
  • Hydro Ottawa Limited awarded its trial costs on a partial indemnity basis (parties to agree quantum).