Question: The Paddocks hired Harper Realty to sell their hotel. The Paddocks agreed that if Harper sold the hotel, they would pay Harper a commission of $15,000, with $3,000 down and the balance in monthly installments. The Paddocks gave Harper a note for the $12,000. Harper negotiated the note to McLean, a holder in due course. When the payments were not made, McLean sued the Paddocks. The Paddocks' defense was that they were induced to sign the note because of a false representation by Harper that the note was required, when in fact it was not. Is this defense valid against the claim? (McLean v. Paddock, N.M. 430 P.2d 392)