Introduction to Logic
Tools
for
Thought
 
Hilbert
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Objects  a, b, c
Functions  f, g
Goal  Incomplete






















1 p => (q => r) Premise 2 p => q Premise 3 (p => (q => r)) => ((p => q) => (p => r)) Implication Distribution 4 (p => q) => (p => r) Implication Elimination 3 1 4 p => r Implication Elimination 4 2