Unless you are dreaming that you are asking, then you won't find out until you wake up.
No, of course not! But it looks like it's going to rain donuts again, so saddle up your unicorn and let's head to the nearest green star!
I think it's just a general sleeping. "Am I sleeping?" / "Schlafe ich?" I don't think the sentence is of much use, but it's quirky so we remember it. It could be used in a larger sentence. "Slaap ik later?"
It's useful in the sense that once you get the idea of verbs changing with the grammatical person, you'll also know "Slaap jij?" "Slaapt hij?" "Slaapt zij?" "Slaapt het?" "Slaapt men?" "Slaapt u?" "Slapen wij?" "Slapen jullie?" and "Slapen zij?" Knowing eleven sentences for learning just one, looks like a fairly useful way of learning things.
"Am I sleeping?" vs "I'm sleeping?"--how would this be distinguished?
Without further information, I should think "I'm sleeping?" should also be accepted.
I'm =I am.. 'I am sleeping', a statement (often used in a comical way) rather than a question 'am I sleeping?'
Context, I assume.
Although there is a specific construction for the continuous aspect, built using a form of zijn+ aan het (bare infinitive verb)
In the case of this sentence, if you want to make it absolutely clear it's the continuous aspect, you'd say:
ik ben aan het slapen.
But the use of both of these cinstructions is not as clear-cut as in English.
Do you know that at the bottom of your contributions there are links for editing your typos, and for deleting superfluous comments?
Well, not saying anything would also convey the continuous aspect quite clearly.
Actually, there are several such constructions- At least:
Ik ben aan het slapen.
Ik lig te slapen.
Ik ben slapende.
But basically, it's done from context.