What does reading public mean?

[Kelly]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #39 "State Secrets", question 8

Mind you it has to be a convincing article because the reading public can soon see through the ......... of a weak argument.

(a) clarity
(b) clearness
(c) transparency
(d) transparent

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #39 "State Secrets", answer 8

Mind you it has to be a convincing article because the reading public can soon see through the transparency of a weak argument.

Correct answer: (c) transparency
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Hi Alan
Can u do me a favour ? Please explain to me what does it mean that what does the sentene and the reading public mean?

Thanks a lot

Kelly

[Alan]