The shape of the operators visually shows how the function works. It also has some nice visual properties as A and B -> A d B not A and B -> flip horizontally

The shape of the operators visually shows how the function works. It also has some nice visual properties as A and B -> A d B not A and B -> flip horizontally: A b B A and not B -> flip vertically: A q B not A and not B -> rotate: A p B etc...