Question

by studying the suffix of \fallacy,\ a reader can conclude it means
\without being false.\
\someone who does something false.\
\the state of being false.\
\having the misfortune of being false.\

Explanation:

The suffix -acy often indicates a state or quality. In "fallacy", the root "fall -" is related to falsehood. So "fallacy" means the state of being false.

Answer:

"the state of being false."