In addition, an analogy was only classified as significant if it appeared to be part of a serious attempt to generate or evaluate a solution, and as nonsignificant if it was simply mentioned as an aside or commentary. As an example of a nonsignificant analogy, one subject was reminded of another problem he had seen involving the deflection of piano strings of different lengths, but apparently mentioned this as an aside without the intention of applying findings back to the spring problem.

When executive desk toys first began to appear, they tended to be ornamental gadgets made from such endlessly fascinating materials as sand and magnets. The Newton's Cradle or Executive Ball Clicker, which demonstrates physics principles of momentum and energy, has been sold since the 1960s.

There is a great deal of difference as to the criminalness of false persuasions upon this account: the same error which one person may hold very pardonably, (as being, without much fault of his own, either through weakness of parts, or prejudice from education, or want or opportunity of knowing better, unavoidably, in a manner, led into it; I say, that very same error,) may be extremely dangerous in other persons, that have better parts, …

Just over a decade ago, the bassist Charlie Haden played a drummerless New York nightclub engagement with the pianist Kenny Barron.