[PCMcGee]

This has already been done. It's known as Non-Aristotelian General Semantics. It's even possible to teach yourself how to speak this way. Intelligence agencies sometimes train operatives in it, because then the reports they make are more useful for intelligence analysis. http://esgs.free.fr/uk/art/sands.htm

[gpawl]

The self-help pseudoscience? https://en.wikipedia.org/wiki/General_semantics