The following sentence is a GRE style text-completion sentence, where you must fill in each blank from only one of three enlisted options.
It is telling that some scientific ideas that were once (i) _______ have recently garnered (ii) _______ the intelligentsia, for who knows which ideas now considered (iii) _______ might one day upset the prevailing paradigms.
(ii) disapprobation from
(iii) overtly elaborate
The answers given are ridiculed, currency amongst and patently false respectively.
I am struggling to understand the part of the sentence after the comma
for who knows which ideas now considered (iii) _______ might one day upset the prevailing paradigms.
What does this mean? That there are ideas that sometime in the future will upset the prevailing, accepted view? How does this clue help to decide what answer goes in option (iii)? Without this, I'm also unable to answer the first two blanks.