You know those logical reasoning questions all these international organisations now ask as part of psychometric testing before you go to job interviews?

Where they give you statements:
- all drugs sold in darkmarkets are paid for with crypto.
- all darkmarkets selling drugs only accept crypto.

Logical assumptions that cannot be derived include:
- all crypto is used to buy drugs
- all people buying drugs on darkmarkets use crypto.

See how we can all play this game happily?