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6. Prove valid 1. (x) (-Ax v (Bx * Cx)) 2. (x) ((Ax Cx) = Dx) 2. (y)-(Dy ~Cy) ~ / (Ey) ~Ay 7. Prove invalid by the metho

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6. Prove valid 1. (x) (-Ax v (Bx * Cx)) 2. (x) ((Ax Cx) = Dx) 2. (y)-(Dy ~Cy) ~ / (Ey) ~Ay 7. Prove invalid by the metho

Posted: Wed Jul 06, 2022 11:54 am
by answerhappygod
6 Prove Valid 1 X Ax V Bx Cx 2 X Ax Cx Dx 2 Y Dy Cy Ey Ay 7 Prove Invalid By The Metho 1
6 Prove Valid 1 X Ax V Bx Cx 2 X Ax Cx Dx 2 Y Dy Cy Ey Ay 7 Prove Invalid By The Metho 1 (22 KiB) Viewed 15 times
6. Prove valid 1. (x) (-Ax v (Bx * Cx)) 2. (x) ((Ax Cx) = Dx) 2. (y)-(Dy ~Cy) ~ / (Ey) ~Ay 7. Prove invalid by the method for building a countermodel (x) (-Zx-Vx) (x) (-Vx (Zx * Ux)) (Ex) (-Zx v Ux)
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