This is a legit concern. Right-wing types are always on about pointing out the hypocrisy and inconsistency of lefty types, without apparently realizing that lefties have no problems dropping a subject and shifting the goalposts when they're cornered in an irrationality.
The same thing they do when cornered on small arguments will be applied on large arguments, no problem.Then the next day, they'll have forgotten they were proved wrong and will go right back to harping on the same tired talking points.
If that wasn't so, why would we still be arguing about stupid,easily debunked shit like the wage gap, African-American crime rates, and the criminal behavior of illegal immigrants?