From his definitions of proof, probability, and miracle, Hume concludes, “That no testimony is sufficient to establish a miracle, unless the testimony is of such a kind, that its falsehood would be more miraculous than the fact, which it endeavors to establish; and even in that case there is a mutual destruction of arguments, and the superior only gives us an assurance suitable to that degree of force, which remains, after deducting the inferior.” What does he mean by this, and why does he think that it proves that, in principle, we cannot ever trust testimony about miracles?

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

tom robinson he was a black man that was accused of raping caucasian woman, and an idealistic lawyer offers to defend him. which makes nobody believe in the innocence of a negro.