“That is because you do not know...”
No, it’s because it is clearly not the only rational explanation.
To an irrational person that would be true. Perhaps you also believe that I am not typing on this keyboard right now to post this response. Does your disbelief have any relevancy? No, it doesn’t matter one bit. It simply shows you do not understand or know.
I’m irrational because I can think of other rational reasons for the story. Riiight.