Deny the truth of
Contravene
Negate
Dissent
Disagree
Take issue
Differ
Deny
Contradictory
Contradiction
Be in contradiction with
Belie
Deviate
Depart
Vary
Diverge
Be resistant to
Controvert
Oppose
Refute
Rebut
Veto
Blackball
Negative
Protest
Resist
Prove negative; show to be false
Logical system
System of logic
Logic
Show
Demonstrate
Establish
Prove
Shew
Confute
Nullify
Invalidate
Disprove