因由

因 = 囗 + 大 : Mnemonic symbol: the close reasoner René Descartes.

因 = 囗 + 大 : In front of the encampment, René Descartes, Maud Younger and a robot a starting a big rave. The robot sits inside a big box and is the master of ceremony, while René and Maud are dancing on the square. They started this rave to collect money for a good cause.

由 = 丨 + 曰 : Mnemonic symbol: 自由古巴， a cuba libre. The character 由 itself even looks like a cuba libre.

Maud Younger (y) is taking part in a charity auction in the outhouse's kitchen (ou2). She is auctioning the dinosaur bone (丨) next to her and is speaking into a microphone (曰). In the other hand she is holding a cuba libre (由), and she is already quite drunk.