Television:
Star Trek

Leonard Nimoy: "I find your arguments strewn with gaping defects in logic." (I, Mudd)

Leonard Nimoy: "It's illogical... Does not follow." (Miri)

DeForest Kelley as Dr. McCoy: "Spock, remind me to tell you that I'm sick and tired of your logic."

Leonard Nimoy: "That is a most illogical attitude." (The Galileo Seven)

Leonard Nimoy: "To deny the facts would be illogical, Doctor." (A Piece of the Action)

Nimoy: “Your decision is most illogical, Doctor.”

Kelley: “Is it, Mr. Spock? Is it really?” (For the World Is Hollow and I Have Touched the Sky)

Leonard Nimoy: "Totally illogical." (The Galileo Seven)

DeForest Kelley: "Oh, I know you, Mr. Spock. You've never voiced it, but you've always thought that logic was the best basis on which to build command... am I right?"

Leonard Nimoy: "I am a logical man, Doctor." (The Galileo Seven)

Leonard Nimoy: "My choice will be a logical one... arrived at through logical means." (The Galileo Seven)

DeForest Kelley: "Now, you're the one that's always talking about logic... What about some logic now?" (Arena)

William Shatner as Captain James T. Kirk: "What do you make of all this?"

Leonard Nimoy as Spock: "Totally illogical." (The Return of the Archons)

Leonard Nimoy: "Your analysis seems logical." (The Return of the Archons)

Leonard Nimoy: "Illogical." (Space Seed)

Leonard Nimoy: "That is quite logical, Captain." (This Side of Paradise)

Leonard Nimoy: "Logical. Flawlessly logical." (Amok Time)

Nimoy: "I speak from pure logic." (from Court Martial, according to Dino)

Leonard Nimoy: "Dazzling display of logic." (The Changeling)

Leonard Nimoy: "Most illogical." (The Ultimate Computer)

Someone off-screen: “Impossible!”

Nimoy: “Quite possible... and logical.” (Plato's Stepchildren)

Leonard Nimoy as Spock: "What he says is logical, and I do, in fact, agree with it." (Whom Gods Destroy)

Nimoy: “Only the discipline of logic saved my planet from extinction.” (Let That Be Your Last Battlefield)