Falsifier n. : One who falsifies, or gives to a thing a deceptive appearance; a liar.

Example:
Does anyone understand Decartes and his universal belief Falsifier or his evil demon conjecture?

Taxonomy
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Defination from the web:
Falsifier in the Online Dictionary. Meaning of Falsifier. Pronunciation of Falsifier. Translations of Falsifier. Falsifier synonyms, Falsifier antonyms. ... falsifier - someone who falsifies. beguiler, cheater, deceiver, trickster, slicker, cheat - someone who leads you ...