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4. Use natural deduction to solve the problem. From xRxa xRax and Rba, prove xRax Example question and solution as reference: From premises xLax xLxa
4. Use natural deduction to solve the problem.
From xRxa xRax and Rba, prove xRax
Example question and solution as reference:
From premises xLax xLxa and Lab, prove that Lba.
1. xLax xLxa
2. Lab (Lba)
3. xLax I2
4. xLxa E1,3
5. Lba E4
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