Your question is as profound as asking how do you know anything is real.
Well, no.
It's like asking: "Who wrote this graffiti on this wall. Was it Alice or Bob?" It's a perfectly sensible question so long as you believe that Alice and Bob are real people and not just figments of your imagination.
Let me extend this metaphor further.
Suppose that you know:
(1) From circumstantial evidence, the graffiti must have been written either by Alice or Bob.
(2) Alice is a good kind person and scrupulously honest.
(3) Bob is a sociopath and a compulsive liar who hates Alice.
(4) The graffiti runs as follows:
ALICE IS A SERIAL KILLER.
THIS GRAFFITI WAS WRITTEN BY ALICE.
IF YOU DO NOT BELIEVE THIS GRAFFITI, THEN ALICE WILL KILL YOU.
Now, use your judgment.
Who wrote that, Alice or Bob?
Do you have to believe
out of deference to Alice that Alice wrote the graffiti? Do you have to believe
out of deference to Alice that the accusations against her are true? Would
having faith in Alice involve believing the graffiti --- or disbelieving it?
Edited by Dr Adequate, : No reason given.
Edited by Dr Adequate, : No reason given.