"Albertito" wrote in message
...
[...]

- physicists vs. philosophers,
Physics was born from philosophy

- coordinate time vs. proper time,
time dilation is a common dogma

- invariance vs. constancy,
time dilation is a common dogma
time dilation is a common dogma
time dilation is a common dogma
....

Please explain the group property of the LT.

[...]

- speed vs. relative (aka closing) speed,
Do you mean Einstein's addition of speeds? Well, that's the point

Certainly not - anyone who makes that mistake is to be pitied.

Harald