半疑半信

Explanation: Some doubts, but also a bit I believe. Said non-true and false can not be sure of. 　　Source: Tang Yuan Zhen's "ancient fortification song": "Please rest and Mainz, Krupp came to ride. Half and half suspected the letter, fortification still towering." 　　Examples: If the others heard, ~, if the deposit if the death, An Debu idle. ★ "Zhu Shu" sixteen volumes