Psychologist: Psychotherapists who attempt to provide psychotherapy on radio or television talk shows are expected to do so in ways that entertain a broad audience.
Conclusion
Psychotherapists should never provide psychotherapy on talk shows.
Evidence
On a talk show, you're expected to entertain a broad audience, which is nearly always incompatible with providing high quality help.
Evaluation
We know our conclusion is that psychotherapists should never do something, so we need a rule about what psychotherapists should never do. Why should they never go on talk shows? It's almost always incompatible with providing high-quality help. So the rule could sound like,
The question stem asks what must be assumed, so there are other necessary assumptions we could say: - psychotherapists appearing on talk shows sometimes provide therapy in the way they're expected to - medium-quality psychological help is not significantly helpful to broad audiences - when a psychotherapist appears on a talk show, the purpose involves at least some high-quality help
Goal
We want a conditional bridge like If it's almost always incompatible with high-quality help, then psychotherapists should never do it or anything else that would qualify as a Necessary Assumption.