Spaces and sleeping in

The day before yesterday was the first Saturday of the last four Saturdays that I didn't need to get up at 4:00 am in order to catch a flight. I slept in, until 6:00 am. Bliss.

On a completely different note, I was led to wonder over the weekend about the use of the letter a, by itself, as both an indefinite article and a prefix meaning negation (as in atypical). The indefinite article and the prefix often (usually?) have opposite connotations. For example, "Become a part" means to "join with" while "Become apart" means to "separate from." What a difference a space makes!