T-Rex: There are some questions you can never answer "yes" to honestly, and chief among them is "Are you sleeping?" If I say "yes", I'm lying!
T-Rex: I'm a stone cold liar!
T-Rex: Damn, man!

T-Rex: What the hell!

Dromiceiomimus: Maybe by answering "yes" you're actually saying "I'm TRYING to sleep"?
T-Rex: So - what, I'm answering the question I WISH I were asked rather than the one I got? No way. Anyone who answers "yes" to "are you sleeping" is a LIAR.

Utahraptor: Okay, are you dying?
T-Rex: No, Utahraptor, I'm not!

Utahraptor: Aha, but aren't we ALL dying from the moment we're born? Only it's slow.
T-Rex: Okay, YES, we're all always dying slowly, THANKS FOR THAT, but we're not all SLEEPING slowly.
Utahraptor: Aha, but death is often referred to as a sleep or rest!

Off panel: And dividing our average lifespan by the age of the universe, we find that answering "yes" to "are you sleeping" is accurate over 99.9999994% of the time!
T-Rex: Utahraptor, you -
Off panel: SEEMS LIKE A PRETTY SAFE BET TO ME, CHUMLY