#4968: updates to inspect.is* function docs.
diff --git a/Doc/library/inspect.rst b/Doc/library/inspect.rst
index 0f54376..1f5e72e 100644
--- a/Doc/library/inspect.rst
+++ b/Doc/library/inspect.rst
@@ -204,18 +204,19 @@
.. function:: isclass(object)
- Return true if the object is a class.
+ Return true if the object is a class, whether built-in or created in Python
+ code.
.. function:: ismethod(object)
- Return true if the object is a method.
+ Return true if the object is a bound method written in Python.
.. function:: isfunction(object)
- Return true if the object is a Python function or unnamed (:term:`lambda`)
- function.
+ Return true if the object is a Python function, which includes functions
+ created by a :term:`lambda` expression.
.. function:: isgeneratorfunction(object)
@@ -245,13 +246,14 @@
.. function:: isbuiltin(object)
- Return true if the object is a built-in function.
+ Return true if the object is a built-in function or a bound built-in method.
.. function:: isroutine(object)
Return true if the object is a user-defined or built-in function or method.
+
.. function:: isabstract(object)
Return true if the object is an abstract base class.
@@ -259,8 +261,9 @@
.. function:: ismethoddescriptor(object)
- Return true if the object is a method descriptor, but not if :func:`ismethod`
- or :func:`isclass` or :func:`isfunction` are true.
+ Return true if the object is a method descriptor, but not if
+ :func:`ismethod`, :func:`isclass`, :func:`isfunction` or :func:`isbuiltin`
+ are true.
This, for example, is true of ``int.__add__``. An object passing this test
has a :attr:`__get__` attribute but not a :attr:`__set__` attribute, but