Ergo ipso facto

Filbert was confused by the news that Star fish were dying and thus allowing Sea Urchins to proliferate and kill off forests of sea weed.  In any case he wanted to check on his trove of fresh water abalone; native only to these waters.  The Foggy Bottoms Resort and Spa was a sanctuary; the taking fresh water abalone was prohibited.   the Face of Everyman applied his situational ethics algorithm: He himself had never seen one; ergo ipso facto one cannot poach something that doesn’t exist.