This isn't open for debate, it's a fact. If three circles of the same size are in perfect alignment, you will be able to draw parallel lines that touch all three models bases on both sides. Just go draw it in paint or something to see what I'm talking about. That same line that touches the first circles base also touches the second and third circles, meaning that circles 1 and 3 "see" each other. In order for the middle circle to block 1 from 3 and vice versa, it would have to interrupt the line. It clearly doesn't, since the line continues to touch all three circles.