Five observers have already looked at each table. Now you.
You will see a series of small still lifes. For each one, tap the first place your eye goes, as soon as it settles. Don't search the picture and don't try to be clever: the first landing is the answer.
Each table appears after a short blank with a dot in the middle. Look at the dot, then at the table.
This only keeps your taps apart from other people's. Nothing else about you is recorded.
Here is who you sided with. A witness counts as agreeing with you when it looked at the same vessel you tapped.