If I sing beautiful songs on the street, that has a material value one could measure. It represents economic growth compared to a world where I do something unp

If I sing beautiful songs on the street, that has a material value one could measure. It represents economic growth compared to a world where I do something unproductive, like arguing basic reasoning with people on HN. It does not, however, require more input materials. I swear, one day I'll find out why the software crowd, of all people, is completely incapable of understanding the difference between "material" and "real".