In what circumstances will an attorney be denied a claim for damages for misrepresentation and misrepresentation?

Given appellant's experience and knowledge as an attorney, he should have known such a promise, as pleaded, was subject to some independent confirmation, particularly as the promised modification was indefinite and related to a mortgage for real property, which was governed by a written agreement. (Kahn v. Lischner (1954) 128 Cal.App.2d 480, 489 ["[I]f the conduct of the complaining party in the light of his own intelligence and information, or ready availability of information, was manifestly unreasonable, he will be denied a recovery."].)