IGNORE THESE WORDS

Another strange subway story from the past week: On Wednesday night, above the platform of the First Avenue stop on the L line, a digital sign displayed the following message:

THIS IS A TEST
DISREGARD MESSAGES

This was the Möbius Strip of subway alerts.

If this alert is true, why should I regard THAT message? And if it's not true, why even bother displaying it -- especially when the only other message on display was the correct time and date?

My brain hurts.