Competent witness

COMPETENT WITNESS. One who is legally qualified to be heard to testify in a cause. In Kentucky, Michigan, and Missouri, a will must be attested, for the purpose of passing lands, by competent witnesses; but if wholly written by the testator, in Kentucky, it need not be so attested. See Attesting witness; Credible witness; Disinterested witness; Respectable witness; and Witness.

References in classic literature ?
He wrote very briefly, neither approving nor blaming my decision, but strongly reiterating his opinion that I should do well to choose a competent witness as my companion at my coming interview with Dexter.
Troy introduced Moody as a competent witness, thoroughly acquainted with the circumstances, and ready and willing to answer any questions relating to them.
The court noted that the law is that in any suit for a medical injury, the plaintiff shall have the burden of proving by affirmative evidence which must include expert testimony of a competent witness or witnesses: (a) The standard of reasonable professional practice in the medical care provider's profession or specialty thereof, if any, at the time the medical care in question was rendered; and (b) That the medical care provider failed to act in accordance with such standard; and (c) That as a proximate result thereof, the injured person suffered injuries, which would not otherwise have occurred.
But because of the husband and wife relationship, Mr Mullany will be a competent witness but not a compellable one.