Reason for solipsistic belief
My personal reason for adopting this viewpoint has to do with the things I have experienced over the last several years. For example, being homeless and having to struggle to keep a cleanly shaven face while all the other homeless men around me never have so much as a five o'clock shadow. Years went by and their hair never seemed to grow even a millimeter. Going out of the house in a shirt and shorts because the sun was shining. Everyone around wearing similar clothing. Suddenly, the weather turns and it starts pouring rain. 2 minutes later while im still trying to run for cover I notice everyone around me is now magically wearing jackets and carrying umbrellas.