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In "The Transporter Malfunction", The Big Bang Theory S05Ep20, Sheldon logics with Mr. Spock action figure (voiced by Leonard Nimoy) to the conclusion that it's illogical to own a toy that he doesn't play with.
Spock: Dr. Cooper?
Sheldon: Is someone there?
Spock: Down here. On your desk.
Spock: I need to speak with you.
Sheldon: Fascinating. The only logical explanation is that this is a dream.
Spock: It is not the only logical explanation. For example, you could be hallucinating after being hit on the head by, say, a coconut.
Sheldon: Was I hit on the head by a coconut?
Spock: I am not going to dignify that with a response. Now to the matter at hand. You need to play with the transporter toy.
Sheldon: But it's mint-in-box...
Sheldon: ...and to open it would destroy its value.
Spock: But remember, like me, you also have a human half.
Sheldon: Well, I'm not going to dignify that with a response.
Spock: Consider this. What is the purpose of a toy?
Sheldon: To be played with.
Spock: Therefore, to not play with it would be...?
Sheldon: Illogical. Damn it, Spock, you're right. I'll do it.
Spock: Sheldon, wait. You have to wake up first.
Sheldon: Oh, of course. Set phasers to dumb, right? Goodie, goodie, goodie!