Quoting OP:
> the CEO is going to investors pitching the fact that we've built/are building some deep learning engine that can be applied to all problems.
> If they are proving solutions for customers, it does exist.
From the perspective of a client with a particular project, provided the client's needs are met at a reasonable price, they are happy. It does not matter if their needs are met by application of some state of the art proprietary general purpose AI tech, or by application of standard open source technology and a lot of hours of consulting/professional services work.
From the perspective of an investor, there is a huge difference between a company that has state of the art proprietary AI tech, and a company that merely offers professional services using the same tech than any competitor has access too.
The former company has a much bigger competitive advantage / "moat" and is likely a far better long term investment.
Claiming that you have proprietary tech to potential investors when you don't is fraud.
Claiming that you are planning to build such tech is perhaps not fraud if you are indeed planning to build such tech, it'd be up to the investor to evaluate how likely that endeavour is to succeed.