No Spiders Are Insects (No Spider Logic)

m] Spiders can’t be insects because they are eight-legged.


n]   All spiders are eight-legged.
     No insects are eight-legged.
     No spiders are insects.   

 Key:

1.  Top:  Odilon Redon, SmilingSpider, 1891.

2.  Bottom:  Odilon Redon,Crying Spider, 1881.

3.  Textexcerpted from:  Logic by Wesley Salmon (Englewood Cliffs, Prentice-Hall,1973).