“It’s outta here … or my name isn’t Saxby Chambliss.” A disjunction, with the logical form P ∨ Q. (P in this case is something like “I’ll hit it out of the park”, expressed colloquially as “It’s outta here”.)
One use for such sentences is to use them in contexts where ¬Q is given, from which, by Disjunctive Syllogism, in the form:
P ∨ Q, ¬Q ∴ P
we conclude P. So, P ∨ Q (“I’ll hit it out of the park, or I’m a monkey’s uncle”) in a context where it’s clear that the speaker is not in fact a monkey’s uncle (Q is transparently false) leads to the conclusion P, “I’ll hit it out of the park”.
In the Zippy case, Q is itself a negation, ¬R (“My name isn’t Saxby Chambliss”), so the relevant variant of Disjunctive Syllogism is
P ∨ ¬R, R ∴ P
In a context where R (“My name is Saxby Chambliss”) is transparently true, P ∨ ¬R (“I’ll hit it out of the park, or my name isn’t Saxby Chambliss”) leads to the conclusion P, “I’ll hit it out of the park”.
Ah, but then R is the problem: Is Mr. Toad’s name Saxby Chambliss (the name of the senior U.S. Senator from Georgia)? Is that Mr. Toad’s secret life, serving as a U.S. Senator? If so, then Mr. Toad is predicting that he will hit the pitch out of the park. If not, then we’re faced with:
P ∨ ¬R, ¬R
from which, if ∨ is inclusive disjunction, we can conclude nothing beyond the premise P ∨ ¬R. If ∨ is exclusive disjunction, though, then only one of the disjuncts (P and ¬R) can be true, so that if ¬R is true, P is false: Mr. Toad is predicting that he won’t hit it out of the park.
So everything hangs on the identity, or identities, of Mr. Toad. He doesn’t look much like Saxby Chambliss to me, but he just might be cleverer at adopting identities than I’m giving him credit for.
(Why Saxby Chambliss?, you ask. Probably because Bill Griffith is a fan of unusual and interesting names, and Saxby Chambliss is certainly one of those. And it’s phonologically attractive: an alliterative double trochee, with the same vowel in the accented syllables of the two feet and with phonologically very similar vowels in the unaccented syllables, plus the consonant patterning /s … b … b … s/.
Sen. Chambliss did play baseball for the University of Georgia in his college years. I haven’t found any evidence on his prowess at batting.
No, I don’t know where the wet boxer shorts came from.)