Re: ..?Dark-matter Quicksand? (Episode?)
Voyager hit a "subspace sandbar" in Bride of Chaotica
, but that doesn't sound like what you're talking about.
It sounds like you're referring to TNG's Booby Trap
“There is a cult of ignorance in the United States...The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge'.” - Isaac Asimov