Well, even though, the thread was hi-jacked, we still managed to get a good discussion going.

If we continue to keep an open mind, and a sense of humor (humour) we can learn things, even into old age.

The points taken with usage is also correct. Common usage changes our dictionaries every day.

You can look at kilt web-sites and see many spellings of the same things.

One black knife has finally been standardized into sgian dubh, but it wasn't that many years ago, that you would see many spellings of that term.

The plural is seen many places as both sgian dubhs and sgians dubh.

I, for one, would like to see sgèanan dubh adopted, but I will be happy with sgians dubh.