"You are aware that the courts accept and allow testimony from any number of so-called experts in many different fields such as doctors, psychologists, engineers and natural scientist, just to name a few?
"Yes."
"This does not necessarily mean that all of these are one hundred percent correct in their testimony. It just means that the court accepts and allows it. Is that correct?"
"Yes."
"Sources of error can exist in handwriting analysis, can they not? There are a lot of judgment calls just like there is in most professions, isn't that correct?"
"Yes."
"So we really have no evidence that handwriting analysis is infallible. In fact, there are document examiners that are honest enough not to claim that."
"Well, they must be graphologists. We are on a different basis and it cannot be carried over to what we are doing."
Trenchant then named a well known document examiner and asked if Avery knew of him.
"Of course."