[spunkets]

"the difference between “should” and “shall”."

You're being obtuse.

" Please explain to me how the use of the Article 15 document shows that Mr. Rumsfeld said what you claim."

Not only Rumsfeld, but Bush too, because they have said nothing to the contrary. It's trivial that if they had, the Article 15 would be dropped.

[R. Scott]

"the difference between “should” and “shall”."

You're being obtuse.

There is nothing obtuse about the meaning of words.

It's trivial that if they had, the Article 15 would be dropped.

Article 15s are often used by the Chain of Command as a CYA measure