Antonyms of adj fallacious

3 senses of fallacious

Sense 1
fallacious, unsound -- (containing or based on a fallacy; "fallacious reasoning"; "an unsound argument")

INDIRECT (VIA invalid) -> valid -- (well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract")

Sense 2
deceitful, fallacious, fraudulent -- (intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes")

INDIRECT (VIA dishonest) -> honest, honorable -- (not disposed to cheat or defraud; not deceptive or fraudulent; "honest lawyers"; "honest reporting")

Sense 3
fallacious -- (based on an incorrect or misleading notion or information; "fallacious hope")

INDIRECT (VIA incorrect, wrong) -> correct, right -- (free from error; especially conforming to fact or truth; "the correct answer"; "the correct version"; "the right answer"; "took the right road"; "the right decision")
INDIRECT (VIA incorrect, wrong) -> correct, right -- (free from error; especially conforming to fact or truth; "the correct answer"; "the correct version"; "the right answer"; "took the right road"; "the right decision")

Similarity of adj fallacious

3 senses of fallacious

Sense 1
fallacious, unsound -- (containing or based on a fallacy; "fallacious reasoning"; "an unsound argument")
       => invalid (vs. valid) -- (having no cogency or legal force; "invalid reasoning"; "an invalid driver's license")

Sense 2
deceitful, fallacious, fraudulent -- (intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes")
       => dishonest (vs. honest), dishonorable -- (deceptive or fraudulent; disposed to cheat or defraud or deceive)

Sense 3
fallacious -- (based on an incorrect or misleading notion or information; "fallacious hope")
       => incorrect (vs. correct), wrong (vs. right) -- (not correct; not in conformity with fact or truth; "an incorrect calculation"; "the report in the paper is wrong"; "your information is wrong"; "the clock showed the wrong time"; "found themselves on the wrong road"; "based on the wrong assumptions")