Well, since we know a great many mechanisms that generate "paradox" type phenotype, it would seem you are in agreement with my original post that chimera and paradox should not be used interchangeably. That being the case apparently, then you can not say that you know if a given animal is a chimera.
Yes, I agree that chimera and "paradox" should not be used interchangeably.
However, I disagree with your final assertion. With the proper method of interrogation, it is indeed possible to tell if a given animal is a chimera.