Is null valid JSON (4 bytes, nothing else)

Question

Hot debate today:

Is the text stream null valid JSON?

According to http://www.ietf.org/rfc/rfc4627.txt?number=4627:

...

Answer 1

[Note! This answer is no longer correct, see answer by @niksnut.]

Yes, both statements must be true. The literal token null is a JSON value. A JSON text is a serialized object or array, which requires {} or [].

Answer 2

RFC 7159 drops the limitation that a JSON text must be an object or an array. The grammar specifies:

JSON-text = ws value ws

where

value = false / null / true / object / array / number / string

Thus, "null" is now a valid JSON document.