Perhaps in practice, if they passed the M&Ms check, you would say "Great, okay, now talk me through all the other things you set up." whereas if they failed tha

Perhaps in practice, if they passed the M&Ms check, you would say "Great, okay, now talk me through all the other things you set up." whereas if they failed that test, you would say "I'm not willing to take your word on anything, so I'm going to call in an external auditor to check everything, and I'll recover the costs of that from you, for breach of contract."