I think the value here is testing fluency. If a student has easy to hand lookups and cheat sheets, then unsupervised they can appear more fluent. But someone

I think the value here is testing fluency. If a student has easy to hand lookups and cheat sheets, then unsupervised they can appear more fluent. But someone sitting watching would obviously noticed and judge them more harshly than someone reading a completed paper. The obverse is something often complained about on HN - being forced to perform at interviews that do not measure fluency but are tests or other shortcuts to actually sitting with and judging someone