What does "non-conformant parent" mean?

I've been away from active Eiffel programming for a while (maybe a year).
I think I have missed something big.

As I am browsing the library documentation for
class COMMAND in the "design-patterns" cluster.

I notice the phrase "non-conformant parent" and it confuses me.
According to the documentation, class COMMAND has a "non-conforming parent" class ANY.

At first thought I think that means that COMMAND inherits from ANY
but does not conform to class ANY.  My immediate reaction is: "HUH?"
What does that mean?

I continue to try to understand, and  check the documentation for class COMMAND and am pleased to know that COMMAND does have all the features that I expect it to "get" from class ANY (if it inherited them from ANY), and am temporarily relieved, since I know I can "call" those features.

So what does "non-conforming parent" mean?
Does it mean that I cannot pass a COMMAND as an argument to a procedure that expects an ANY argument?
If so, then how is "non-conformance" valuable to me?
I do not see any advantage to "non-conforming parents".
Can anyone open my eyes?

Does this have something to do with multiple inheritance?

Thanks.

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