Philosophy on the Can

An ideal place to philosophize? Some might say so.
(From: Wikipedia)

"Long before the sixth century B.C.E., there were already flourishing civilizations in the eastern Mediterranean, the Middle East, Asia, and Africa. The Greeks (or Hellenes) were a group of nomadic Indo-Europeans who came down from the north and replaced a people already settled by the Aegean Sea. (This displaced people moved and founded a great civilization on the island of Crete. We've completely lost their language, but it is hard to believe that they didn't have a profound and complex philosophy. After all, they even had indoor plumbing.) (7) --Robert C. Solomon and Kathleen M. Higgins, A Short History of Philosophy

The question here is whether the fact of indoor plumbing serves as: 1) an indication of this civilization's engineering and intellectual prowess, or 2) as a facilitator for reaching higher levels of philosophical abstraction. In other words, does the availability of an indoor toilet as an ideal location to philosophize lead one to the conclusion that this civilization's philosophical complexity was probably high?