Shemwell Co. purchased a printing press from Jones Equipment, Inc. Shemwell signed a promissory note for the purchase price and signed a security agreement stating, "The buyer waives as against any assignee of the security interest any claim or defense that the buyer may have against the seller." Jones assigned the promissory note and security agreement to 1st Bank. The waiver-of-defenses clause is not enforceable against Shemwell if 1st Bank did not give value for the assignment from Jones. After the assignment, 1st Bank learned the printing press had malfunctioned. Jones knew the printing press could malfunction. Jones had issued a written warranty on the press