P
S
Phi 270
Fall 2013
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Homework for Philosophy 270, Fall 2013

Homework on §8.5—assigned Wed 12/11 and due Fri 12/13

(to PDF format)

Use a derivation to show: ∃y (Fy ∧ ∃x Rxy) ⊨ ∃x ∃y Ryx