What on earth does "Your all alone" mean?

What is the word "Your" referring to? Your what is all alone? I saw that nonsense posted on here and I tried asking the poster what it meant but (s)he wouldn't explain in a sensible and logical manner. How are we supposed to respond to such a nonsensical post?

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SomeMichGuy · M

The phrase is definitely ungrammatical, but not nonsensical.

Creating alternate ids here in order to try to inform others that their posts are ungrammatical is the truly nonsensical response, especially when you do so continually and go after users who don't care about such things.

You might as well harass others about mathematics or science or geography or music, etc., with which they are not familiar or about which they do not care to know.

KarenKC · 56-60, F

@SomeMichGuy Who is creating alternate IDs? I only have this one. If that phrase is not nonsensical, how do you understand it?