Invalidate is to dismiss. "No, it isn't that bad." "No, you don't feel that." "Oh, you feel good enough to go back to work." Dialectical means to pit opposites against each other and try to find a middle ground. I've read, when DBT stalls, the therapist will try to jumpstart it by saying something invalidating. They are suppose to be careful, because the client became sick by invalidation in the first place. I don't know what to do???I'm feeling sick. Read my blog under crackednfragile.