Spock Prime gives Scotty future technology in order to get Kirk and Scotty to the Enterprise.
That's definitely cheating, no matter what his motives are and no matter his assertion that Scotty will discover it himself at some point in the future.
Pretty cut and dried in that respect.
I can buy that. Keeping in mind what you just said allows me to enjoy the scene more. Thanks for the information.
Except that Spock gives Scotty the information after this scene; unless Kirk can see into the future, he can hardly accuse Spock of cheating that he has not yet undertaken.