The only time you should answer a reviewer is if you know you can change the reviewer's mind.

If you know you can change the reviewer's mind, slap yourself twice, turn off the internet, and go eat potato chips and drink wine in the bathtub until you've forgotten all about it. Because you're wrong.

(If you are right, the reviewer will be a lot more receptive after you've gone through three or four chips-and-wine cycles, dried out, and fortified yourself with kitten pictures.)