Deriv 2.028 t28: → r) ㈠ (pa-r-> -q) deriv 2.030 t30: (prap-raq) deriv 2.031 t31: (p→ q)→ (par deriv 2.032 t32: r)a (q s)-> (paq logic 2010: derivation logic 2010: derivation logic 2010: derivation logic 2010: derivation → qar) ras)

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