【格言】In order to disprove the assertion that all crows are black, one white crow is sufficient.  posted on 2017/01/01 (  433 )

---

In order to disprove the assertion that all crows are black, one white crow is sufficient.

In order to disprove the assertion that all crows are black, one white crow is sufficient.

-- William James, The World's Religions: Our Great Wisdom Traditions