You are completely and utterly wrong, and should stop trying to be a lawyer. There is no "egregious" requirement as you claim. Adding a "kernel of truth" does not vitiate fraud, and there is a legal obligation to disclose certain facts. "Tailoring which information to selectively share with a sale prospect," and not telling all you know is also likely concealment (see below.)
The facts here (lying about Marriott not being in Interval and showing a book meant for points exchangers and not weeks owners) fulfills all of the elements of fraud, plain and simple.
Concealment is also considered fraud. Parties to a contract are required to disclose material facts that they know or suspect the other party does not know.
Yes, there may or may not be some defenses, and fraud is difficult to prove, but the above is the law in almost every state. And in 39 of those states you can legally record your conversation with the salesperson without their knowledge.