Contrary to conscience, morality, or law:
going counter to the facts (usually as a hypothesis)
Contrary to fact or truth:
Seeming to be good, sound, correct, logical, etc. without really being so; plausible but not genuine
The definition of spurious is something that is not true.
Not faithful or loyal
Find another word for counterfactual. In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for counterfactual, like: hypothetical, wrong, contrary to fact, frequentist, a posteriori, true, counterfactuals, causality, false, specious and spurious.