What is Protestant Reformed?

What is a table? Something which has four legs and a flat surface, you say? I can think of several things which fit such a definition and yet are not tables, for instance a stool. Besides, a table does not always have four legs. Something at which one eats? There are many tables which do not fit that definition and a table is not a necessary place at which to eat. It is rather difficult to define a simple thing like a table, isn’t it? It is usually rather difficult to give any definition with a...