In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.
在我们推理关于事实的过程中，有各种可能的确证程度，从最高的确定性到最低级别的道德证据。
实验中的每一次失败都是离成功更近的一步。
Innovation is the key to creating value and solving problems.