Complexity bias is a logical fallacy that leads us to give undue credence to complex concepts. "Faced with two competing hypotheses, we are likely to choose the most complex one. That’s usually the option with the most assumptions and regressions. As a result, when we need to solve a problem, we may ignore simple solutions — thinking 'that will never work' — and instead favor complex ones." Article: Complexity Bias: Why We Prefer Complicated to Simple