"I went in search of my art, often in danger of my life. I have not been ashamed to learn those things I could, even from vagabonds, barbers, and executioners. For we know how a lover will go a long way to meet the woman he loves. How much the more then, will the lover of wisdom go in search of his Divine Mistress." Paraselsus
Sharon is right. Minds can think alike. Crooks, frauds and great minds also can think alike. So the similarities can be mime or similar thoughts and postulations coming into existence by . coincidence. So proof is needed.