Seriously, I believe the omission of Infinity and NaN from JSON is a huge mistake, if not Crockford's bad joke. It is commonly said that JSON was originally going to be `eval`ed and Infinity and NaN could have been redefined, but that eval had to be already preceded by filtering anyway so you can put a few lines to ensure that Infinity and NaN are expected values. Or use `Function` instead. Or use `1/0` or `0/0` as pseudo-literals. Not every JS value is present in the JSON data model, but it's absurd that not every JS number is present in it.