I have been working through the LSAT Trainer (2013 edition) and I’m currently on logic games.
On page 164, there are solutions to the uncertain groups drill. For question 4’s diagram, under the 3rd column, the element ‘G’ is crossed out. Why is this? (I realise this is a small detail but I really don’t understand how that could have been inferred, and am worried I’m missing something.)