Every 20-minute block that passes costs exactly 1Ф — no exceptions. This maps directly onto the oldest insight in economics: time is the only truly scarce resource. The Romans called it tempus fugit. E.P. Thompson showed (1967) how industrialisation turned time into a commodity traded for wages. Edgar Cahn's 1980s time banking proved communities could circulate care using hours as currency. Your Ф goes further — it makes your own time legible to yourself. The question Dismylo asks isn't "how many hours did you work?" but "how many coins did you earn back?" Spent coins on deep work, rest, or meaningful activity become positive overrides. Coins that drained away on distraction stay at −1Ф. The ledger doesn't lie.