"Um, well, I'm not rubbing my face in it now: it touched the floor for longer than five seconds," Al pointed out the logical choice. "Riddle will just have to be disappointed.
And if she wanted to notify me of her recent name change, and future surname change, a memo would have sufficed. Why invite me to an event I cannot attend? It's irrational."
If Lily had sent out the letters with the hope to stir up something, she succeeded, in roundabout way, in stirring up Al's confusion at the chaotic and the unexplained. As they discussed the probabilities of such chaotic and irrational act, Al noticed the now-familiar owl returning with the reply and pointed at it.
"Look, another potential deathtrap. Um," he readied his wand. "So what's the proper procedure for opening these envelopes again?"