Defining OO as based on the use of class hierarchies and virtual functions is also practical in that it provides some guidance as to where OO is likely to be successful. ↗
I think most people played both variants and regular games. It was a period when variants were very popular and there were a lot more variants being played at that time. Every week practically, it seemed someone would publish a new variant in a zine. ↗
In other words, the better they did on the IQ test, the worse they did on the practical test and the better they did on the practical tests, the worse they did on the IQ test. ↗