I am playing Edna & Harvey: Harvey's New Eyes and don't understand the solution to the pizza puzzle:
I have to make a single pizza with 4 toppings for a group of 4 uniquely "colour-blind" people. Each has their own like and dislike, and their own pair of colours that they mix up.
Adrian wants tomatoes, but no blueberries.
Petra wants broccoli, but no tomatoes.
Droggeljug wants banana, but no broccoli.
Peter wants blueberries, but no banana.
Adrian mixes up his reds and yellows.
Petra mixes up her yellows and greens.
Droggeljug mixes up his greens and blues.
Peter mixes up his reds and greens.
We have all four toppings available, and are able to change their colour (to red, yellow, green or blue) through a process of dyeing that we shan't speak about. Bleh.
I tried a few ways of reasoning through this puzzle. For example, if Adrian mixes up red and yellow, we can dye his tomatoes yellow. He'll think they're red tomatoes, and Petra won't recognise them. But none of my approaches worked as expected, so I resorted to a walkthrough that gave the following solution that I do not understand:
Adrian mixes red and yellow colors. He wants tomatoes and no blueberries on his pizza. So he should have green tomatoes.
Peter mixes red and green colors. He wants blueberries and no bananas on his pizza. Red and green makes blue. So he should have yellow blueberries.
Petra mixes yellow and green colors. She wants broccoli and no tomatoes on her pizza. So she should have blue broccoli.
Drogglejug mixes green and blue colors. He wants bananas and no broccoli on his pizza. So he should have red bananas.
Can someone take me through the logic that arrives at this answer?