you needed a fourth cup with tea and milk that was heated to the same temperature as the tea that didn't ever have milk in it, so we could see four lines on the chart
You didn't take the warming of the milk into account. If you take it out of the fridge just before adding it in both cases, then the answer is indeed trivial.
Thanks. My wife and I were debating this and Google and you helped out!
Great scientific method and explanation!Was wandering about this today and you did the test perfectly.Undeniable results! Good science!
My husband and I were debating this too! You seem like a smart intellectual, want to hang out some time? I can see us becoming good buddies.