A web magazine has conducted a Facebook "alertness" test in a bid to measure the site's responses to supposedly graphic content and indeed just what it defines as inappropriate imagery.
Theories of the Deep Understanding of Things (TDUT) posted a picture of a blonde woman sitting in a bath, with her elbows resting on the edges of the tub.
![](https://img.huffingtonpost.com/asset/5d02b0292100009518f15574.jpeg?ops=scalefit_720_noupscale)
The picture, which shows no nudity, was apparently taken down almost immediately, and TDUT posted the following update on its Facebook page.
![](https://img.huffingtonpost.com/asset/5d02b029210000dc18f15578.jpeg?ops=scalefit_720_noupscale)
In summary, it's looking like Facebook moderators mistook elbows for nipples (did you?), and hundreds of incredulous responses to the apparent gaffe have been left.
![](https://img.huffingtonpost.com/asset/5d02b0292500004e12e6afba.jpeg?ops=scalefit_720_noupscale)
The experiment was publicised as the social networking giant repeatedly comes under fire for removing pictures of breastfeeding mothers, citing a violation of terms where photos feature a fully-exposed breast.
The Huffington Post UK has made enquiries with Facebook about this incident and awaits a response.