Flag every claim I have not supported

Before publishing anything persuasive, or anything with numbers in it.

Audit the text below for claims that are not supported.

Go through it and list every factual assertion. For each, classify it:
- **Supported here**: evidence or reasoning is given in the text.
- **Common knowledge**: safe to assert without support.
- **Needs a source**: plausible but a sceptical reader will want proof.
- **Overstated**: true in a weaker form. Give me the weaker form.
- **Unverifiable**: cannot be checked as written, usually because it is vague.

Pay particular attention to statistics, superlatives, "studies show", causal claims built on correlation, and predictions stated as facts.

Then tell me the single claim most likely to be challenged, and what I should do about it.

Text:

Polish and final checks. Sentence-level style, proofreading, consistency and one last critique before it ships.