document.write( "Question 1194046: CREATE A PROOF FOLLOWING THE ARGUMENT\r
\n" ); document.write( "\n" ); document.write( "(F • ~C) ⊃ (G • ~C)
\n" ); document.write( "C ⊃ D
\n" ); document.write( "~D
\n" ); document.write( "F ∨ D /G
\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #826129 by math_tutor2020(3816)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "This is one way (of possibly many) to do the derivation.
\n" ); document.write( "\n" ); document.write( "\n" ); document.write( "
NumberStatementLine(s) UsedReason
1(F & ~C) -> (G & ~C)
2C -> D
3~D
4F v D
:.G
5F4, 3Disjunctive Syllogism
6~C2, 3Modus Tollens
7F & ~C5, 6Conjunction
8G & ~C1, 7Modus Ponens
9G8Simplification
For more information, check out the various rules of inference and rules of replacement as shown in the link below.
\n" ); document.write( "https://logiccurriculum.com/2019/02/09/rules-for-proofs/
\n" ); document.write( "
\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );