Why are two instances of "object" considered non-identical although their "id()" are the same? [duplicate]

Question

According to the Python Language Reference:

The ‘is’ operator compares the identity of two objects; the id() function returns an integer representing its identity.

CPython implementation detail: For CPython, id(x) is the memory address where x is stored.

However:

>>> object() is object()
False
>>> id(object()) == id(object())
True

How is this consistent with the documented behavior? Why are the two objects considered non-identical although their id() are the same? Why is object() is object() considered False although id(object()) == id(object()) is True?