As our brains are sense-making machines, they pretty much supply us with an explanation for everything we see. Occasionally the brain is stumped and we become conscious of the process. When that happens, it's a great opportunity to go into scientific mode and test a hypothesis. Don't just make an assumption and go on. Form a theory and do some research.
Daily Good: How to Train your Brain to See What Others Don't, 2013-Sep-8 by Carolyn Gregoire
"There's a belief that correlation doesn't imply causality, which is true. People see all sorts of correlations in coincides that turn out to be spurious, so they get a bad reputation," Klein says. "But in my work I find that a lot of insights are fed by people spotting coincidences and making assumptions, and instead of just saying 'It must be true,' doing to follow-up work to find out if it's true."