The sexular purpose is to declare the districts's neutrality in the contraversy between Evolutionists and their opponents. Darwinism has never been a matter of science alone but of competing world views.
This is a keeper.
The anti-evolution crowd is clearly motivated by concerns that have nothing to do with evidence, but somehow related in their minds to "morality". By which they mean sex. They do not intend dishonesty to be one of their "moral concerns" since the creationists, Noah's Flood apologists practice this all the time. No, it is something about sex that keeps bothering them.
Or maybe it is the materialistic methodology, naturalist, nazi, communist, atheist, racist, feminist plot to fluoridate the water supply. Sometimes it is hard to know which kinky notion motivates the poster.