RS <Or they might not agree on such details. One might say that the light was
red and the blue car was speeding, the other might not have noticed the color
of the light and said that the white car was speeding. Then you have nothing
approaching certainty.>>
So, in our hypothetical case, you have agreed that if FOUR correspond on
major details, we have virtual certainty as to those facts; if they disagree,
we do not.
Are you ready for the next step?