You are asking an interesting philosophical question, I feel a little out of my depth trying to answer.

But yes, I believe every meme is an idea, every idea is a meme, and there is a 1:1 relationship. The word "meme" is just an idea that is viewed through the lens of evolution.

Now as for the second question- should a screenshot of Twitter be allowed on this "meme" sub? - I don't have a strong opinion, but I lean towards no