That's not how it goes at all. You cannot prove (or even provide evidence for it) so it is there is no justification to assume it to be true. It doesn't mean it's false but you don't believe something because you can't disprove it.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~
That's not how it goes at all. You cannot prove (or even provide evidence for it) so it is there is no justification to assume it to be true. It doesn't mean it's false but you don't believe something because you can't disprove it.
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~