# Small source ambiguities explained clearly

Subject: Advertising and Public Relations

Exam: M2

Reader: https://deep-learning-study-room.vercel.app/apr/#m2/about/sources/clarifications

Canonical: https://deep-learning-study-room.vercel.app/read/apr/m2/about/sources--clarifications/

Kept separate from the learning flow

- The notes label the models heading “2.5”, although the confirmed portion begins at 2.6 and includes the remainder of Unit 2. Models are therefore included.
- The marketing-review passage calls its brief “five areas” but lists four named areas. The four printed areas are taught; the separate five-step strategic process is also taught.
- The Ehrenberg lesson follows the course’s awareness–trial–reinforcement–nudging version. It does not claim that a single rigid sequence describes all buying.
- A reach is a unique audience measure. Gross impressions count repeats. Media delivery measures do not themselves prove recall or sales.
- Older marking outlines sometimes simplify PR as two-way and advertising as one-way. The guide explains that emphasis without treating it as an absolute.
- The December 2025 marketing-review question and its scheme differ. Its answer covers the printed wording and separately explains the strategic steps expected by that outline.
- M1 pp4–5 say five levels but list six; the guide teaches all six. Extra-personal follows the notes’ human–machine/AI explanation. Public speaking is labelled a supporting distinction.
- The M1 online examples include historical products and some broad technical claims. The guide distinguishes ordinary SMS from internet messaging, labels Jamboard as discontinued, and explains that geofencing/NFC do not automatically reach every nearby phone.
- An actual classroom case narrative is not present for every old case title. Those answers use verified public context and explicitly avoid made-up results or case facts.