Tomosynthesis is a three-dimensional imaging technique that provides an arbitrary set of reconstructed images of the breast.

BBC: Derriford Hospital uses 3D imaging for cancer diagnosis

In practice, it's a confusing set of arbitrary guidelines not everyone follows.

CNN: Rate your office etiquette

But what doesn't make sense -- and the only thing that we've seen from Republicans so far in terms of proposals -- is to replace this set of arbitrary cuts with even worse arbitrary cuts.

WHITEHOUSE: President Obama Makes a Statement on the Sequester

But I mean we did, we did have a debate at the time, I mean this went on between all the political parties and as I say following the inquiry as to whether you should set some arbitrary limit and in the end we decided not to.

BBC: NEWS | Programmes | Breakfast with Frost | Economy is key battleground

Mr Shannon alleged his place on the year-long economic and social history course was withdrawn due to the "arbitrary figure" the college had set.

BBC: Damien Shannon

How can it be more plausible to draw an arbitrary line based on equidistance when there is already a jurisdictional boundary set out?

ECONOMIST: Broadcast news

Different jurisdictions set varying standards for how many similar points are required, which makes this standard seem arbitrary.

ECONOMIST: Fingerprint evidence