Premise: If math proposition, then observation cannot prove it true. (If A, then B) Conclusion: If math proposition, then it is impossible to know it is true. (If A, then C)
Assumption: If observation cannot prove it true, then it is impossilbe to know it is true. (If B, then C)
The contraposition of the assumption is answer choice E. (If NOT C, then NOT B)
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2011-3-13 21:24:40
