What do the proof quality score and evidence level mean?

The score (0–100) is a working aid: specificity, outcome, origin, who is speaking, audience, fit with a claim, recency, consent and media. Separately, the evidence level L0–L5 says how robust the proof is: from general praise (L0) through a quantified result (L3) to independently verifiable (L5). Both are recalculated on every load and never shown publicly. “How to make it stronger” lists what's missing.