visual aid

Stone cannot name something without it being put up on screen as a visual aid—so, for instance, if he should mention the New York Times, you will be certain to see the famous Grey Lady script crop up on screen.

As such, no visual aids are allowed, including decks, videos, demoes, etc.

Drawing heavily on the work of leftist academics, the series also incorporates scripted passages and animations that serve as guided meditations on human suffering more than as visual aids.

Timothy B. Lee has a good visual aid at Vox showing exactly how this occurs.

When the question needs to be raised, he may use the discussion method or perhaps some visual aid.