Originally Posted by DSpider
I think you want to use <em></em> and <strong></strong> for italics and for bolds, because <i> and <b> are deprecated.
But I don't know why. I vaguely remember reading something about why, but I forgot. They make more sense to me than <em> and <strong>.
I believe we are supposed to use <em> and <strong> because they are semantic markup, whereas <i> and <b> are presentational. We are supposed to use css to describe how we want things presented, and only have the structure put into the text. It's a matter of purity, although how you present italics or bold in a text to speech transcription is an obvious case in point.