“Extremely impressive detective prowess,” just like she told Shauna and Linton.

Actual answer, I’m sure there was a reason – probably something they let slip when Claire was lighting their cigarettes with a disturbing number of lighters. But the investigation was seen from Beate’s point of view, where Lottie and Claire just pulled it out of their hats by magic. So I’m going with a narrative choice rather than an omission.

Now if they get to the political dissident chess grand master, I will demand all the details.