Kepler-78b is a planet that shouldn't exist. This scorching lava world circles its star every eight and a half hours at a distance of less than one million miles -- one of the tightest known orbits. According to current theories of planet formation, it couldn't have formed so close to its star, nor could it have moved there. (1)

"Should" is based on axioms.

Science cannot be based on nothing.

However the real world does not support "should" - it always finds a way to nullify it. Does that mean it is based on nothing?