How many are there in the universe?
Do we have any celestial data for which we say "hmmmm, this doesn't seem to fit our model?
Exactly how many photons (assuming for the moment that photons really ARE particles) of light would you assume have been tested??
How many photons of light would you say are there in the universe?
How categorically sure can you be that all travel at the same rate of speed, given the paucity of your data set?
There is nothing wrong with using a working model, as long as you people are honest about the infinitesimally small data set you are using to propose it......,, and you do not. Instead you mock. That is the response of a heresy tribunal and not an empiricist.
Instead you mock.
:'-(
If you're complaining about my treatment of you in particular, that's quite apart from this issue and is due to your treatment of me. According to my data set, you're among the more spiteful people I've run into here. So please don't martyr yourself over it. It's much more effective when you don't begin your martyrdom by poking the lions with sticks prior to leaping in the cage.
I'm glad you are planning to post on Newton. Please feel free to include gravity in your discussion of Newton's Principia. You might want to read Newton on gravity before continuing.