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 in English typically denotes a state, quality, or condition. For "fallacy", the root is "fall-" meaning false, so the suffix -acy turns it into the state of being false. The other options do not match the function of the -acy suffix: "-less" would mean without, "-er/-or" refers to a person, and "-ed" would relate to a condition of having misfortune.

Answer:

"the state of being false."