It is also true that we can never prove anything beyond a shadow of a doubt. Can you prove that you are not in reality just the figment of another's imagination, soon to disappear when that being loses interest?
No. You cannot. But we do not live our lives like that nor do the products we use everyday operate like that.
You are completely free to accept that everything in this world is unprovable and go about like that, but it's hard to be rational (or sane).