In what dictionary does “profitable” means “excluding everything else”?
The same one in which ‘sufficient’ means, ‘exclusive’
Contrary to the strawman often used, SS does not exclude everything else, as Scripture actually provides for things such as reason, nature, the church etc. as Westminster affirms. The "sola" refers to Scripture being alone as the infallible standard for faith and practice, with its sufficiency existing in the formal ore material sense. See lengthy response to this here if you want: http://www.freerepublic.com/focus/religion/3034405/posts?page=484#484