It is not as crazy as it sounds.
Defensive theories, while totally credible, can sometimes be perceived as outrageous. In some of these cases, different types of evidence is used to prove a defensive theory. But, this evidence must meet the requirements of the Federal Rules of Evidence and be relevant to the case.
Let’s say you are facing an aggravated sexual assault of a child charge and one of your theories is that the child artificially inseminated herself and got the idea from the popular television show Law & Order SVU, sounds crazy right? Well, believe it or not, there is a case on it.