So, by that logic if I make a desktop window manager that looks just like Windows, Windows is then Open Source?
I mean, really, what kind of argument is this? X builds a thing. Y copies the appearance of X's thing. An employee of X then claims that is evidence of X being open source.
If you want to refute my claim, where is the source code for HN?
One of these years we'll release an update that incorporates how HN has evolved over the years. But we have several other projects to get out first. Also we wouldn't do it without pg's blessing.