Generally, a defendant can not take discovery evidence from one case and use it another case. (slaw.ca)
[54] Examination for discovery evidence of the plaintiff's mother confirms that the plaintiff is the only person in the family using the family computer between those hours. (bc-injury-law.com)
In Ontario, Rule 30.1 sets out the limits for using discovery evidence in one proceeding in another proceeding. (slaw.ca)