It's a new tool and we have our doubts about its reliability and validity. I would feel better about the whole process if I felt better about the testing tool, and it was consistent over a number of years.

From a durability standpoint, I don't know that there's much more you can do. We're real pleased with its reliability.

The course of the SPD and its reliability is not so clear anymore,

A successful tool is one that was used to do something undreamt of by its author.

He who is not sure of his memory, should not undertake the trade of lying.

It is disturbing to discover in oneself these curious revelations of the validity of the Darwinian theory. If it is true that we have sprung from the ape, there are occasions when my own spring appears not to have been very far.