There&#x27;s <i>some</i> progress: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sequential_lineups" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sequential_lineups</a><p>The part that boggled me was how recent (and incomplete) was the introduction of blinding to police lineups. Apparently it really was (and is?) common for the witness to pick out a suspect, and for the cop to know the &#x27;real&#x27; suspect and say things like &quot;Are you sure? Take your time.&quot;<p>From another Feynman talk: &quot;This is not yet a scientific age.&quot;