Now, this is not only a light, but THE light in my daily life for me as an IB student. You, Sir Richard Thornley, have increased my mark by at least two, maybe three grades in chemistry HL. You really earned a place in the IB Hall of Fame, if such a place exists. If not, you're at least in mine. I only have one question: Which of the following do you like the most: ties or coffee cups? Cheers!