Compute and draw the truth table that shows the truth function of propositional formulas. [show]

Edit a formal proof in propositional Fitch proof system and verify the validity of each line. This is a prerequisite for 1st-order Fitch system. [show]

First-order Fitch system closely reflects the human mind engaging in a rigorous mathematical proof. [show]

Copyright © 2009–2019, Proofmood. All rights reserved.