Question: Determine whether the following sequents are valid or invalid using indirect truth tables. If valid, give a proof (using primitive and/or derived rules). If invalid

Determine whether the following sequents are valid or invalid using indirect truth tables. If valid, give a proof (using primitive and/or derived rules). If invalid give an invalidating assignment. P&Q (T<->S),~P~T, ~(~RvS)|-Q->~T

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