4 Categorical Propositions
4.6 Venn Diagrams and the
Traditional Standpoint
Venn Diagrams and the Traditional
Standpoint
Up to now, All S are P looked like this:
S
P
Since we are assuming existence in the
traditional standpoint, we will render it thus:
X
S
P
Venn and the Traditional Standpoint
No S are P now looks like this:
X
S
P
Both Boolean and traditional standpoints agree
about particular statements, so there is no
change to those Venn diagrams.
Proving the Square with Venn
Use pages 240 & 241 (221 & 222 in 9th ed) to test these inferences; for
class, just consider one pairing: A to O, O to A, then A to O assuming A is
false, then O to A assuming O is false.