That was my first command to the super-efficient and oh-so exclusive personal assistant that lives inside my new iPhone GS. Yeah, yeah. I know Siri isn't exclusively at my beck and call. If my Facebook feed is any indication, lots of good little boys and girls got her under their tree this year. I've been testing Siri's limits all day and she's great at reminding me of things, finding directions and even looking things up on the Internet. But when I asked, "Siri, how old am I?" she replied" "I don't know. I've wondered that myself." So, there you have it. If Siri can forget my age, then so can I.