lucy24 - 9:45 pm on Nov 28, 2012 (gmt 0)

if you ever decide that you want to change the presentation

I'm talking here about the narrow case where presentation is the rule-- mainly in tables. (That's, ahem, real tables. Not tables for format.) Not to be confused with something like
h4.lesser {text-align: left;}
where the default h4 is center-aligned. Or even td.number, which will always be right-aligned, but may have other universal properties as well.