negate vs system of logic

negate is not a noun while system of logic is a noun.

Word	Noun	Adjective	Verb	Adverb
negate	No	No	Yes	No
system of logic	Yes	No	No	No

negate (noun)	system of logic (noun)
	a system of reasoning

negate (verb)	system of logic (verb)
make ineffective by counterbalancing the effect of
prove negative; show to be false
deny the truth of
be in contradiction with