There are questions on which it is fair to give equal attention to both sides. “Is football a better game than baseball?” “Which is better on a pizza, pineapple or jalapenos, or both?” There are some things where the evidence hasn’t settled one way or another, and we should pursue alternatives, but there are others where there is no controversy. “Is the Earth flat?” “Is the earth about 6000 years old?” “Are black people and women as deserving of rights as white men?” If you’re going to address those questions honestly, taking no sides is dishonest and biases the argument in favor of the untenable side.

PZ Myers on sides.