[Androcles]
| >| > Rate at which time flows... is that seconds per second?
| >| > That's like metres per metre or kilograms per kilogram.
| >| > Meaningless

 [Wilson]
| >| Not so, A.
| >|
| >| The gradient of a hill is in metres/metre.

 [Androcles]
| > <Shudder>. Henri, in case you didn't notice, and I want you to concentrate
| > really hard now, there are THREE spatial dimensions. The gradient of a hill
| > uses TWO dimensions, nne vertical and the other horizontal. (Actually we use
| > the height and the hypotenuse, but that is simply convenience for a public
| > that has no knowledge of trigonometry.)   We don't ever use metre per metre
| > in the horizontal plane, it is meaningless.

 [Wilson]
| That's correct. There must be more than one spatial dimension for
| 'metres/metre' to be meaningful.
|
| ..but if you take a metre rule out into space, it doesn't wont tell you if it
| is pointing along x, y or z.

 [Androcles]
That is MY point, not yours. You can only have one metre per metre.