At best you can say, "Hey, look, my idea
has an INTERNAL logical consistency."
The Big Bang Theory Season 1, Episode 3
...and the result
was an INTERNAL blitzkrieg...
The Big Bang Theory Season 1, Episode 11
Internal jugular.
Money Heist Season 1, Episode 5
a record of the INTERNAL process
of their cognition.
Westworld Season 2, Episode 9
(SIGHS) Can it be more of
an INTERNAL struggle?
The Big Bang Theory Season 10, Episode 7