If you forget your ID, then the extra screening will attempt to find existence of the ID in databases. The ID still needs to have been issued in the first place. This is mainly if you lose your driver's license while traveling, it lets you get back home. It is in no way some kind of general-purpose mechanism for flying without ID. And it's a gigantic hassle that may take hours at the airport to sort out, leading you to miss your flight and wait to be rebooked.
You're absolutely being pedantic and argumentative, and I can't even begin to imagine why. I assume you know perfectly well that an ID is required to fly as the general rule. I can't imagine what you think you're trying to accomplish by arguing otherwise.
And if you really want to be pedantic, note that the word used is "may", not "shall":
> In the event you arrive at the airport without acceptable identification (whether lost, stolen, or otherwise), you may still be allowed to fly.
You're absolutely being pedantic and argumentative, and I can't even begin to imagine why. I assume you know perfectly well that an ID is required to fly as the general rule. I can't imagine what you think you're trying to accomplish by arguing otherwise.
And if you really want to be pedantic, note that the word used is "may", not "shall":
> In the event you arrive at the airport without acceptable identification (whether lost, stolen, or otherwise), you may still be allowed to fly.
Because it's not a guarantee.