知
=
口
+
矢
:
Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).
arrow / dart / straight / to vow / to swear / old variant of 屎[shi3]
矢
=
𠂉
+
大
:
Sherlock Holmes and the robot are playing darts in the space station. Sherlock Holmes is a sore loser and thus programmed the robot to throw keys instead of real darts.
智
=
日
+
知
:
In the space station's bathroom (Ø4), the sun (日), Francis Bacon (知) and James II of England (zh) are competing for who's the most knowledgeable of them. They all present each other their smartphones (智能) on which they use apps to determine their IQ (智商). In the end it turns out that they are all retarded (弱智).