use of placeholder as a label for an input

You haven't explained why using a palceholder without any other
> label is insufficient. To make this concrete, consider the search box on <
> http://antarvasna.us, which has a placeholder of "search reddit" and no
> other label. What concretely is the problem http://mobihot.in ,with this?
There may be a
> reason this is bad, but you have not explained to the WG what it is.