Distant Starlight in a Young Universe: Rømer, Maxwell, and Occam

We may freely stipulate the speed of light in any one direction to be anything between ½c and infinity, and the return-trip speed is set by the constraint that the average speed of light must always be exactly c in vacuum (186,282.397 miles per second). We here explore additional objections to the conventionality thesis. These have all been refuted in the technical literature within the past century. But few people have access to such literature, and so a review is expedient.

A Refutation of Phillip Dennis’s Claims Regarding Alleged Inconsistencies in ASC

Did Phillip Dennis actually disprove the conventionality thesis (Dennis 2024)?  Did he really prove at long last what physicists over the last century have been unable to do – to establish that the one-way speed of light in any given direction must be the same as the round-trip speed of light?  Did he find any genuine inconsistency with the Anisotropic Synchrony Convention (ASC) and the young universe model upon which it is based?  Well, no to all of the above…. We show below that when the full synchrony-independent equations are used, they do not support Dennis’s conclusion but rather the opposite.  Furthermore, we will demonstrate several critical errors in Dennis’s analysis and show that several of his claims are incompatible with the physics of relativity.