sentences: if something zero something else then that something contributes to that something else
docs: fault is tangible_thing. zero is lower_number_than_one. zero is set_containing_one_element. no_thing is nothing_yet_no_one_knows. change is when_one_thing_becomes_another_thing. trivial_zero_divisor is zero_divisor. damn is worthlessness. zero is digit. zero is numerical_quantity. zero is number.