can / may / able to / to approve / to permit / to suit / (particle used for emphasis) certainly / very
可
=
丁
+
口
:
Karl Marx (k) is challenging his abilities (可) in the elevator's living room (e3). He tries to force a nail (丁) into a mandarin (口), just by using his head. On top of that he tries to do so one thousand times, in order to create a bed of nails (mnemonic symbol for 可).
可
=
丁
+
口
:
Alternative mnemonic symbol: kebab, from the pronunciation "ke". Karl Marx (k) is preparing a kebab (mnemonic symbol for 可) in the elevator's living room (e3). He also skewers mandarins (口) on the long steel nails (丁) and will only allow (可) his guests to eat the rest of the kebab if they eat their mandarins first.
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).
opinion / view / theory / doctrine / to discuss / to talk about / to regard / to consider / per / by the (kilometer, hour etc)
论
=
仑
+
讠
:
Lenny Lemur (lu) finds an advertising column (讠) in the encampment's bathroom ((e)n4) and on it a discussion (论) of his blackcurrant wine (仑). The discussion (论) is very negative and so Lenny angrily throws blackcurrants at it, messing up the ad.