occam's razor
A medieval guy said you shouldn't make more guesses than you have to. It's like when you're trying to fix your bike and you don’t need to believe the ghost of your childhood pet is haunting you.
Your dog ran away. It didn’t get taken by aliens. It just got distracted by a squirrel.
Your car won't start. It’s not because of a curse. It's just out of gas.
You failed your test. Not because the teacher hates you. Just because you didn't study.