Query about question "The art exhibit, featuring avant-garde sculptures, challenges visitors to ________ their preconceptions about modern art...." [https://www.gregmat.com/problems/verbal?problem=the-art-exhibit-featuring-avant-garde]

GRE GRE Verbal Problem Solving
1

https://www.gregmat.com/problems/verbal?problem=the-art-exhibit-featuring-avant-garde

Why not ?
discard — subvert

  • discard preconceptions = get rid of / reject existing beliefs
  • subvert preconceptions = undermine / challenge existing beliefs
2

The definitions you have here are proof they are not synonyms as much as weigh and examine are.

Using discard/subvert creates two different meanings of the sentence that are not equivalent.