I never implied that the tips were heat resistant. But angling the tips down brings the area close to the fuselage closer to the exhaust. And why is bringing the tips of the stabs closer to the thrust line a more compelling reason for the anhedral than low-speed (high AOA) yaw stability due to an aerodynamic dihedral effect (which was told me by an engineer who had first-hand knowledge of the F-4 project, and corroborated by the son of another engineer with similar qualifications)?

The tail of the F-4 definitely lifts negatively at least some of the time (low speed at least, unless the designers wanted to make the tail less efficient): notice the negative camber and the negatively operating leading edge slots. This means the tail is operating with a pronounced aerodynamic dihedral effect, which by definition would provide some positively stabilizing effect. It also may bring the tail into some "cleaner" air, and there may also be an effect involving entrained airflow influenced by the exhaust, etc.

Furthermore, if it is so desirable to have the stabilizers as close to the thrust line as possible, which you seem to be implying, then why are there so many T-Tail jets with otherwise relatively similar configurations?