It's worse than that, since it may give the lazy or disingenuous an opportunity to muddy the waters by pointing out that... "hey Y reverses Z (or 0.00001 of it)

It's worse than that, since it may give the lazy or disingenuous an opportunity to muddy the waters by pointing out that... "hey Y reverses Z (or 0.00001 of it) so we don't need to worry about it any more!".