A derogatory prepatory statement in a sentence used when telling someone something they should already know, but, in fact the author knows they do not.

1. The default beliefs installed when you were a child.

2. An unexamined position you absorbed from your environment growing up.

A preparatory statement used in a sentence to avoid giving offense. It assures the listener that he or she already knows the fact about to be mentioned and that the speaker is mentioning it merely to acknowledge its truth or to help make a point.