OK let's say I am standing outside with my neighbour (or anyone for that matter) one evening, looking up at the night sky and they point out to me what looks like a moving star. They say 'Hey look.. that ones moving... what is that?' I reply 'O yes, that's a satellite..'
At which point what do you think is the most likely reaction. Are they going to insist that I go to the nth degree to 'prove' to them beyond any element of doubt that it really is a satellite or are they simply going to respect my knowledge and experience of looking at the sky over many years and accept my word that what they have seen really is a satellite and leave it at that.
This is interesting. I could honestly see it play out like this if I were your neighbor:
Me: "Hey look.. that ones moving... what is that?"
You: "O yes, that's a satellite."
Me: (Not being a contrarian or even challenging you, just light conversation) "Or maybe it's a meteor, a comet, a shooting star..."
You: "No, it's definitely a satellite."
Me: (Again, not being a contrarian or even challenging you, actually just interested in how you know, in a "what am I missing" sort of thing) "How do you know?"
You: "Because that's what satellites look like when they pass overhead."
Me: "Wow, satellites look like shooting stars..."
You: "They do, but that is a satellite, not a shooting star."
Your conversation with your neighbor (me) amounted to you stating that it was a satellite simply because you said so. That's a friendly, neighborly conversation. Now apply your logic to a debate as to whether such things as satellites even exist. You just saying they do does not cut it. It doesn't even cut it in the neighborly conversation let alone anywhere else more divisive.
My stepdad, most annoying guy I can think of, actually applies this logic when I am stargazing in my mom's back yard:
Me: "Look, that is *name of star*."
Him: "Well it could also be a satellite."
Me: "It's not moving..."
Him: "There are geostationary satellites, they don't move relative to Earth."
Me: "Look at this app (showing the screen on my phone), it confirms it is a star and geostationary satellites are too small and too far away to be seen."
Him: "Your app could be wrong."
At those moments I want to tear out my own fingernails. This has happened repeatedly. The reason I go to their back yard sometimes to watch is because my sister still lives with them and she loves it when I teach her what you can see in the sky.