Rabbit's-foot postulate?

Question

Generalizing from a rabbit's foot being said to be lucky, to which the standard retort is "well it wasn't very lucky for the rabbit, was it?".

Postulate:

rabbits' feet are lucky when they occur in fours (three=> unlucky, five =>mutant)

when they occur in eights (four male, four female), they are extra-lucky.

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Answer 1

a rabbit foot's only considered lucky if the rabbit was caught in a  graveyard and only the left hind leg is to be used.

Answer 2

this is just another case of post-hoc fallacy