Question

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

Explanation:

The suffix "-acy" often indicates a state or quality. So, "fallacy" with the root "fall" (related to false) and suffix "-acy" would mean "the state of being false".

Answer:

"the state of being false"