I am learning about Extended Type System from MSDN, I’ve learned the fact that all objects in pwsh has intrinsic members like psobject, pstypenames etc. Does this implies all object in pwsh is [psobject]? If it does, why does -is [psobject] returns false for some object like a native number literal 123. And I noticed that the object that’s not a [psobject] will be converted as [psobject] after being piped into a cmdlet. So there’s yet another question, when will pwsh implicitly convert an object into [psobject]? And when do we need to explicitly convert to it?

1 -is [psobject] # False
1 | % { $_ -is [psobject] } # True

After finishing writing this question, I started thinking that those views like pstypenames and other intrinsic members are not part of the [psobject]? I am not sure just a guess. So are they more primitive things in pwsh that cannot be described by a type?

1 -is [psobject] # False
1 | gm -MemberType MemberSet, CodeProperty -Force # object views returned