how is Jane Austen antagonistic toward shams and conventions.?In the book pride and prejudice?

Question

also why is truth vitally important in her novel

Answer 1

Truth is important because any kind of deceit is exploited by the characters with bad intentions, most notably Wickham but also Lydia and the Misses Bingley; Austen's hatred of shams is notable in these characters, and also in Mrs. Bennet, who while not a liar is concerned to put up a false front, which makes her ridiculous.