the opposite of non sequitur can be:
cliche (if used for humorous purposes, since non sequitur is completely irrelevant, but a cliche means common and overused)
or
apropo or apt (meaning it is very relevant)
that's cute...why not ask someone who is blind from birth what red LOOKS like? Non sequitir.
The opposite of "oui" in French is "non," which means "no."
The opposite of a conviction is a non-conviction. (See non-conviction)
The opposite of "oui" in French is "non," which means "no."
non-communicable is the opposite of communicable.
the opposite of precise is non-precise?
The opposite of talent is non-talent
The opposite would be non-radioactive. For elements, the opposite is stable.
The word that is opposite of the word "recyclable" is "non-recyclable."
Non-congruent or incongruent is the opposite of congruent.
Increase
Fiction could be the opposite. Non-factual also could be the opposite.