“Hes noted for discovering pairs of things, typically galaxies and quasars, which radically differing redshifts and yet which are very clearly joined together and are part and parcel of the same things, i.e. hes known for destroying the idea of interpreting cosmic redshift as recession velocity and hence also as distance.”
He hasn’t destroyed anything. The smaller of the pairs of objects are frequently high mass, high velocity objects seen through the tail of a galaxy. The objects have a different matter distribution than the galaxy and have been id’d as distant objects. Skip Arp’s theory goes back to 1973 or 1976 I believe, and nothing, no piece of data has shown up that would give us the ability to say that redshift could occur in a (sort of) stationary object. Nada.
The 6,000 year old age of the earth was developed by James Ussher, an archbishop of the Anglican church in Ireland. Publishing this theory in 1650, he declared that the earth was created at nightfall of the day before October 23rd, 4004 BC.
Believers of this time line for earth’s creation used to be called Ussherites, but now go by the name Young Earth Creationists.
That idea has basically been debunked, just too many such coincidences. In other words, beyond some point, connections stop being coincidental.