If astronauts spend long periods in zero gravity only if calcium is reabsorbed in their bodies, then astronauts on a Mars voyage will arrive with brittle bones. If astronauts attempt a voyage to Mars only if they spend long periods in zero gravity, then astronauts on a Mars voyage will arrive with brittle bones. Thus, astronauts on a Mars voyage will arrive with brittle bones.
(Z, C, B, V)
P.S: indirect proof(IP) cannot be used!
- suggest using Reductio ad absurdum and Conditional Proof if needed
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Expert's answer
2020-09-02T06:46:56-0400
Dear Ifann Li, your question requires a lot of work, which neither of our experts is ready to perform for free. We advise you to convert it to a fully qualified order and we will try to help you. Please click the link below to proceed: Submit order
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