No judge would admit it in evidence, because no competent witness can connect it up.

I am a competent witness and I intend to tell the whole truth".

Any person who cannot appreciate the obligation this imposes is not a competent witness.

Any party to proceedings is a competent and compellable witness for any other party.

But the ability to talk does not alone make a competent witness.

"The court rules that Lummox is not a competent witness."

There must be at least two competent witnesses.

The correct place for that argument to be made was on the witness stand, by competent and duly sworn witnesses.

Other competent witnesses were offered and objected to, simply because they would not admit they were experts.

The witnesses must be halakhically competent witnesses, and so cannot be a blood relative of the couple.