If the only way and place that the truth and reality can be known to exist is in and by a believing mind, then there is no way or place outside of a believing mind that the truth and reality can be known to exist.
But this can be proven false, if you can simply show just one other way or place outside of or besides a believing mind that possesses the capacity for belief that a believing mind possesses. And if you cannot show of one other way or place outside of a believing mind that can know and make known the truth and reality, then you must concede that the truth and reality requires a believing mind in order to exist and to be made known to exist.
But this can be proven false, if you can simply show just one other way or place outside of or besides a believing mind that possesses the capacity for belief that a believing mind possesses. And if you cannot show of one other way or place outside of a believing mind that can know and make known the truth and reality, then you must concede that the truth and reality requires a believing mind in order to exist and to be made known to exist.