“Disclosure is not a fishing expedition. Disclosure cannot be used to cause delay, deliberately burden an opponent with unnecessary costs or to reap tactical advantage: Chernyakhovsky v. Chernyakhovsky 2005 CarswellOnt 942. It cannot be used to confuse, mislead or distract the trier of fact’s attention from the main issues – even if done inadvertently”: Boyd v. Fields 2006 CarswellOnt 8675.”