My chemistry teacher pulled a much better example of "Wisdom of crowds". We were told to measure exactly 25 ml of both water and alcohol, mix them, then report

My chemistry teacher pulled a much better example of "Wisdom of crowds". We were told to measure exactly 25 ml of both water and alcohol, mix them, then report the volume. It was a competition to see which team got the closest to 50 ml... So we all reported our values on the board at the front for comparison. At the end, the team closest to 50 was declared "A Liar" because alcohol and water do not mix to the same volume as their constituent parts, thus the final volume should have been closer to 46ml and the team closest to 46 was awarded as the winner of the competition. Blew my 15 year old mind and I never biased my answers towards my bias again.