TL:DR You can only prove that your mind exists and everything around you may or may not exist. I think, therefore i am (by thinking you prove you exist.)
Solipsism (/ˈsɒlɪpsɪzəm/ SOLL-ip-siz-əm; from Latin solus 'alone' and ipse 'self')[1] is the philosophical idea that only one's mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure; the external world and other minds cannot be known and might not exist outside the mind.
Source: Wikipedia
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