This is almost verbatim what my 9/11 Truther college buddy would say. I'm not convinced it's a good rule of thumb. It's way too easy to say "there's no consensus on chemtrails/evolution/etc"
Except that there is a consensus on those things. It's just not unanimous.
Maybe not 100%, but Occam's Razor suggests disenfranchised voter groups are the underlying reason Trump won, not dank memes.
Of course Occam's Razor doesn't always point to the correct answer, just the simplest one.
Can you demonstrate that the 'disenfranchised voters' argument requires fewer assumptions than the 'meme' argument?