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1.
While a non sequitur is a comment which does not logically follow the preceding comment, and a pre-sequitur is a comment relating to something mentioned much earlier in a conversation, a post-sequitur follows something yet to be said.

Compared with non sequiturs and pre-sequiturs, genuine post-sequiturs are rare, as most Americans find them immoral.
Jack: Hey there, sweet thang.
Jan: Sure, I'd love to.
Jack: Would you like to go out for a drink? Wait, what?
Jan: Hells yeah it was!
Jack: Was that some kind of post-sequitur?
Jan: Fine, have it your way. Toodle-oo!
Jack: Away with thee or I shall do mur-rer-der-r-r!
by DanielR January 02, 2008
 
2.
Post-Sequitur
A thought or sentence that continues the previous statement or thought before the prior compleation of thought and or sentence.
This may be due to either a break in the mental stabilty of one's logic chain, or the possiblity that the subconcious answers the question before the concious mind has fully formed it. Other possibilities lay within apathy or acceptence of the individual.
As opposed to a 'brain fart' there is no time between a) the orginal thought and b) the inturrupting conclusion.
"Do I want to... never mind that would be dumb." i.e. Post-Sequitur
"I want to say... don't you think?" i.e. Post-Sequitur
"Was it my, doesn't matter I don't regret it." i.e. Post-Sequitur
"Watch.. (he'll figure it out) !!" i.e. Post-Sequitur
by RoninOfTheMoon December 13, 2007