亻
=
丿
+
丨
:
Mnemonic symbol: Rosa Luxemburg. She's quite radical, and her name starts with "r", just like "ren2". Also, 亻appears at the left-hand side of characters, and Rosa is a leftist as well.
Robinson Crusoe (r) and Rosa Luxemburg (亻) are having their favorite snacks in the encampment's kitchen: Rosa is eating a banana (丿) and Robinson is eating a dinosaur bone (丨).
卡
=
上
+
卜
:
Protesting against capitalism in the ashram (a3), Karl Marx (k) attaches everyone's credit cards (卡) to balloons (上) to send them up (上) and away. He uses a voodoo staff (卜) to summon winds to carry the balloons away.