system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: All U.S. paper money is printed with the notice, "This note is legal tender for all debts, public and private." Then why do certain online and mortar-and-brick stores not accept cash?
gpt
You're allowed to settle any debt with cash. But you're not required to enter a contract with someone. There is no debt to settle before the contract has been entered by both parties in the circumstance you're referring too.