2012-07-09
Explanation
This comic explores the philosophical question of what counts as "life" through a computational thought experiment. One character shows another a self-replicating program and argues that if life is defined as any piece of information that can self-replicate when physically embodied, then this program qualifies as life. But then he presses Ctrl+Z (undo), removing the self-replication part, making it "non-life." Pressing Ctrl+Z again restores it to "life." He begins rapidly toggling between life and non-life -- "Alive, dead, alive, dead" -- disturbing the other character. The programmer then casually mentions he has a whole computer that "creates and destroys life all day long." The final panel pulls back to "somewhere outside reality," where two cosmic entities joke, "Hey, what if we make a universe where all meaningful divisions are arbitrary?"
The comic tackles a genuine problem in the philosophy of biology: the difficulty of precisely defining "life." Most proposed definitions (self-replication, metabolism, response to stimuli) have edge cases that blur the boundary between living and non-living things. By showing how a single keystroke can toggle something between "life" and "non-life" under a replication-based definition, the comic demonstrates how any rigid definition produces absurd consequences at the margins. The cosmic punchline elevates this from a biology problem to a broader metaphysical point: perhaps all of our categorical distinctions (life/non-life, conscious/unconscious, person/non-person) are ultimately arbitrary lines drawn on continuous spectra. This connects to the philosophical concept of the sorites paradox, where clear categories dissolve when you examine their boundaries closely enough.