How do you know? Is that a proven fact or just you blieve so?

How do you know? Is that a proven fact or just you blieve so?

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送交者: whoami 于 2012-10-17, 15:34:15:

回答: 还能有别的谁？由 runlikeforest 于 2012-10-17, 15:21:55:

公理不需证明 (无内容) - runlikeforest (0 bytes) 2012-10-17, 15:37:56 (687983)
- 公理is just something assumed to be true by human. - whoami (70 bytes) 2012-10-17, 16:41:48 (687991)