... if you have to lie about it.

"Yeah!  He called her fat!  Really and truly, he did, that's really what he said!  I am totally not lying and putting words in his mouth that he didn't say!  And, and, and, and then he totally ran away crying when I told him off!  Oh, yeah, that's totally true, that's exactly what he did!  That's totally not something that I made up!"

Since some people are better artists than they are logicians, I will spell out that this is an old technique known as setting up a straw man.  It is generally regarded as an admission of failure on the part of the person who feels that, in order to hold their own in the conversation, they need to control both sides of it.