An insane person believes his world is consistent. If he believes the government is trying to kill him, he will see ample evidence of his belief in the so-called real world. He will be wrong, but his evidence is no better or worse than your evidence that it rained this morning. Both of you will be converting evidence of the present into impressions stored in your minds and you will both be certain your evidence is solid and irrefutable. Your mind will mold the facts and shape the clues until it all fits.