In sickbay. MCCOY is giving out vaccines to prevent a virus spreading. KIRK is sat on a bio-bed having just had his. SPOCK is next, and is standing by the door, a small amount of anxiety on his face.
KIRK: (jumps to his feet) Thanks, Bones!
MCCOY: (smiling) No problem, Jim! (looks to SPOCK) C'mon up, Spock, it's your turn!
SPOCK doesn't move.
KIRK: (smirks and looks at MCCOY) Bones, I think he's scared.
MCCOY: (smirks slyly) Y'know, I think you might be right!
SPOCK: Fear is an emotion, doctor, and therefore illogical.
MCCOY: Aww, c'mon Spock. There's no shame in being scared.
KIRK: It's perfectly fine. Nothing to be scared of.
SPOCK: (complete deadpan) I am not scared.
MCCOY: (frustrated) Then what is it?!
SPOCK: (after a pause) I see no logic in being vaccinated against a virus that has been proven ineffective against Vulcans.
MCCOY: Spock, you're half human, there is a 50% chance it it will affect you.
KIRK: Besides, isn't it... illogical to make presumptions?
SPOCK: (raises eyebrows) That is... correct...
MCCOY: Therefore, isn't it illogical to not have the vaccine?
SPOCK: It is. (looks between KIRK and MCCOY) It seems that your grasp of logic has drastically improved. (sits on bio-bed)
KIRK and MCCOY look triumphantly at each other, and KIRK leaves.