Amos -

The form used by the earlier HUAC was phrased more like:

Are you planning to attend, or have you ever been a guest at a birthday party, where someone who might already be on the secret list that we can't show you, or who might ever be added to the list for reasons that we can't reveal, was, or could have been, or might be, in attendance?

That form was used, and apparently was "sufficient" for blacklisting by the HUAC gang of extortionists.

They carried out an extensive investigation, including subpoenas and threats, against Lucille Ball initiated largely, it appears, based on her "coloring her hair red" which could have been a sign of support for "communism."

John