You don't need to name a politician to imply lying. Naming one you believed didn't lie would be more interesting. The problem may be similar to the lie detector

You don't need to name a politician to imply lying. Naming one you believed didn't lie would be more interesting. The problem may be similar to the lie detector problem: if so much of what you say is false and, in some way, you really believe it, it may be indistinguishable from the truth.