Does wearing two thin pairs keep your feet warmer then wearing one thick pair of socks?

It should keep your feet warmer than just one pair. Because that sounds like dressing in layers. Kind of like wearing a t-shirt then a long sleeve sweater then and jacket on top of that. So in the event that it got warmer during the day and you got to hot, you could at least take off your jacket and you'de still have your t-shirt and sweater on. The problem with socks is that if your feet get wet, two wet pair of socks on your feet isn't gonna help. Also if the shoes you wear don't breath well and you have one pair of thermal socks on your feet, then when the day warms up your feet will sweat, which makes for a yucky feeling. A good pair of insulated shoes or boots to match the occasion with just one good pair of regular socks is a much better bet. Match your shoe to the environment and socks will no longer be an issue.