I'm not qualified to answer the question. Not sure anyone is, as in can we take some theory and try to prove it/disprove it?
Still, I like to think that we do live in a universe with more than three dimensions and time because the idea fascinates me with so many what ifs?
What ifs? are at the foundation of the SF. It is what makes SF a genre. Not mundane what ifs? But the big questions about life, the universe and everything. Cue standard response...
Things are difficult at the moment for me. So, just another post as proof of life. Enjoy.