Argument from personal incredulity
Essentially this fallicy is that just because you don’t understand something it’s probably not true. For instance, say you travel back in time 1000 years, ignoring the fact you’d die pretty quick from disease, and you try to explain that the earth isn’t the center of the universe, let alone the solar system. You’d probably be called a heratic, among other things, because the people would have no idea how that would even work.
I played into this fallicy hard for a long time. For instance, I couldn’t think of any other way for people to achieve self awareness on our own. God must have made us this way! This is commonly called the God of the gaps argument, we don’t get it therefore god. I would say that science and religion were meant to work together and anything science couldn’t explain must have been god’s doing. I guess I really didn’t understand how science works, but that’s for another post.