2013/9/22 Mike Meyer <mwm@mired.org>:

> On Sat, Sep 21, 2013 at 5:28 PM, Bardur Arantsson <spam@scientician.net>
> wrote:

> Trying to make something whose name is "Not A Number" act like a
> number sounds broken from the start.

The point here is that IEEE floats are actually more something like a
"Maybe Float", with various "Nothing"s, i.e. the infinities and NaNs,
which all propagate in a well-defined way.