if something is zero shade during zero space and another shade during another time, then at something recessive shade
exact_zero_divisor is zero_divisor. space has zero_pressure point_in_space is zero_dimensional_thing. when_car is parked_speed_zero. negative_number is negative_scalar_interval. zero is lower_number_than_one. no_parking_zone is space. zero is digit. cavity is negative_space. trivial_zero_divisor is zero_divisor.