I was quite amazed when my eldest chose to do a dual subject degree in Maths and Philosophy. Not having had the benefit of higher education other business based a a grounding in economics I could not envisage how the two would work together. Following our chats during his course I became more and more aware of the philosophical nature of mathematics. Still cannot get my head around some of it, but at least now I know I do not know enough to hold meaningful discussions on it. In my opinion of course :-)

BTW - Said eldest son becomes 40 on Tuesday! Makes me feel really old...