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Since the Hubble Constant changes over time (it's a variable parameter), why can't the conflicting values of 67.4 and 73 both be right?

You are confusing the Hubble parameter $H(t)$, which is a function of time, with the Hubble constant $H_0=H(t=\text{today})$ which is the value of the Hubble parameter today, and so of course is a ...
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Since the Hubble Constant changes over time (it's a variable parameter), why can't the conflicting values of 67.4 and 73 both be right?

The values you quote are for $H_0$, which is the value of the Hubble parameter at the present cosmic epoch. It is not some sort of average value over time. So, yes, the fact that different methods ...
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Is there physical evidence to distinguish between the expansion of space and an anthropocentric universe?

I didn't read the other answers but one very simple evidence against us being a stationary center of the universe is that the CMBR redshift is not isotropic, it has a dipole anisotropy, which shows ...
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