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@Ramshutu
Please show me a way in which you can use your feelings of thoughts to change the wavelength of light coming from the sky because you believe in solipsism.
That wasn't the point of me saying that. I'll attack your point directly then.
Your argument boils down to an appeal to popularity. If everyone was blind there would be able to observe observable evidence. If everyone was deaf they wouldn't be able to observe evidence that can be heard. If your argument was not an appeal to popularity do clarify this statement:
Observing something external, having multiple other people observe that something, and all agree both on what they are seeing, and it’s inherent nature does very much make it an objective observation