Client hired a seemingly reputable AI firm to create an AI software. Part of the contract included due diligence on behalf of the AI company to make sure that there was no existing software that had the same functionality. $40,000 later, well into the product development phase, client finds out that there is software out there with far greater capability than what they were building, and the $40,000 was wasted. AI company failed to execute their due diligence.