Either you think that “I have a PhD” is evidence but not good evidence, in which case you are indeed complaining about the omitted modifier, or else you think that “I have a PhD” is good evidence, which is a claim I find astonishing.
Furthermore, you just got finished saying that logical fallacies are (possibly weak) evidence, as if being weak evidence would be relevant, and you linked to a post which says that evidence that is not good is still evidence. These support the interpretation that you were talking about PhDs being evidence at all, not about PhDs being good evidence.
Either you think that “I have a PhD” is evidence but not good evidence, in which case you are indeed complaining about the omitted modifier, or else you think that “I have a PhD” is good evidence, which is a claim I find astonishing.
Furthermore, you just got finished saying that logical fallacies are (possibly weak) evidence, as if being weak evidence would be relevant, and you linked to a post which says that evidence that is not good is still evidence. These support the interpretation that you were talking about PhDs being evidence at all, not about PhDs being good evidence.