Critics of NLP often point that one of the ideas within NLP is that NLP practitioner don’t care about the truth, only about what works. Of course this is a misconception as these critics overlook the philosophical sound theory of pragmatism of which NLP is a part. NLP practitioners want to be practical and actually do something to test whether it works rather then discuss theoretical stuff that makes no difference in practice.

Sense for truth. — Commend me to all skepticism where I am permitted to answer: “Let us put it to the test!” But I don’t wish to hear anything more of things and questions which do not admit of being tested. That is the limit of my “sense for truth”: for bravery has there lost its right.

Gay Science paragraph 52