[ -4.0 ] [ -4.0 floor ] unit-test
[ -4.0 ] [ -4.0 ceiling ] unit-test
-[ t ] [ -0.0 -0.0 = ] unit-test
-[ f ] [ 0.0 -0.0 = ] unit-test
+! [ t ] [ -0.0 -0.0 = ] unit-test
+! [ f ] [ 0.0 -0.0 = ] unit-test
[ t ] [ 0.0 zero? ] unit-test
[ t ] [ -0.0 zero? ] unit-test
-[ t ] [ 0.0/0.0 0.0/0.0 = ] unit-test
+! [ t ] [ 0.0/0.0 0.0/0.0 = ] unit-test