Every time I encounter a crap circle my heart sinks. I first wrote about these contemptible “information” graphics in HBR in 2005, and since then they’ve only seemed to multiply. You know what these are — you may have even used them — though you may not have had a name for them. I aim to change that. These pernicious circles-and-arrows diagrams infest PowerPoint and other business presentations, purporting to clarify an idea while actually obscuring it.