Skeptical Up to Sci. They adopt a stance of sneering, hostile disbelief, and they cultivate an attitude of profound disrespect for their 'overly gullible' opponents.
Some examples are below.
Free energy and Antigravity and Psychic phenomena might be genuine, but this doesn't mean that the world isn't filled with crackpots and self-deluded researchers. If we truely desire to understand the world, then we are forced to fight constantly for clear vision, and we must fight constantly against our human tendency to see only what we want to see. After all, it takes quite a bit of effort to avoid these pitfalls. The man who cannot occasionally imagine events and conditions of existence that are contrary to the causal principle as he knows it will never enrich his science by the addition of a new idea. It keeps him young.