Even more clarification.
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index 5871edb..eb18c89 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -150,7 +150,7 @@
 .. cmdoption:: -E
 
    Ignore all :envvar:`PYTHON*` environment variables, e.g.
-   :envvar:`PYTHONPATH` and :envvar:`PYTHONHOME`, that may be defined.
+   :envvar:`PYTHONPATH` and :envvar:`PYTHONHOME`, that might be set.
 
    .. versionadded:: 2.2