Actually, having seen many ad hominem (tu quoque, circumstantial and abusive), I'd have to disagree.rcglinsk wrote:Your argument is that the speculation I offered is not scientifically significant because it's Einstein's.
From http://people.uncw.edu/kozloffm/logicalfallacies.html
10. Attacking the Person (argumentum ad hominem)
Definition: The person presenting an argument is attacked instead of the argument itself. This takes many forms. For example, the person's character, nationality or religion may be attacked. Alternatively, it may be pointed out that a person stands to gain from a favourable outcome. Or, finally, a person may be attacked by association, or by the company he keeps.
There are three major forms of Attacking the Person:
(1) ad hominem (abusive): instead of attacking an assertion, the argument attacks the person who made the assertion.
(2) ad hominem (circumstantial): instead of attacking an assertion the author points to the relationship between the person making the assertion and the person's circumstances.
(3) ad hominem (tu quoque): this form of attack on the person notes that a person does not practise what he preaches.
Your argument is the abusive variety.
At no point did he disparage Einstein. He simply noted that nobody, including Einstein, has been able to reconcile Relativity Theory (RT) with Quantum Mechanics (QM).
If he had called Einstein an "idiot patent clerk," and claimed that "patent clerks have no business telling physicists how to do their jobs," that would certainly have qualified as both "ad hominem abusive" and "ad hominem circumstantial" (with a smattering of "appeal to authority" or its inverse), for calling him an idiot and referring to his status / occupation (and implying that due to his occupation he has *no* authority).
[Disclaimer: I'm not implying that Einstein was an idiot or that his occupation while considering GR / SR plays any role in determining the worth of GR / SR. Simply offering examples of what would qualify as the specific alleged logical fallacies].
Anyway, perhaps it's neither here nor there...
Also my reading was not that the opinion was excluded "because it was Einstein," but because RT / QM have not been reconciled, and thus opinions from RT are irrelevant to QM and probably vice versa.
I don't know whether that statement is accurate or not, just that it was my understanding of the argument, which appears to have differed significantly from your interpretation of what was said. IE, he didn't say "Einstein's opinion isn't relevant because Einstein is wrong" or "because I don't like Einstein." Rather, he said that since relativity theory has not been reconciled with quantum mechanics, one cannot necessarily take an idea from one and apply it to the other, since the ideas (as currently formulated) appear to be incompatible or at odds with each other.
Just my 2c.
Regards,
~Michael Gmirkin