Memory and psychological continuity (Philosophy HL)

The big idea: If not the body, then what carries you through time? The most famous answer: your memory. The philosopher John Locke argued that what makes you you is psychological continuity — not your body at all.

The Scottish philosopher Thomas Reid found a sharp problem — the 'brave officer'.

Reid's brave officer: It's one man at three ages of his life: first a boy, then a soldier, then an old general.

• As a young soldier, he could remember being beaten as a boy. • As an old general, he can remember being that brave soldier — but he has forgotten the childhood beating.

Now apply Locke's rule (you are whoever you can remember being). The general remembers the soldier, so general = soldier. The soldier remembered the boy, so soldier = boy. Put those together and the general should be the boy. But the general has no memory of the beating, so by the very same rule the general is not the boy.

So the one man both is and is not that boy — a contradiction.

Go further — higher-level insight: The standard repair (from Parfit and others) is overlapping chains: A links to B, B links to C, so A and C are the same person even with no direct memory from A to C. It saves the memory view from Reid — cite it for a top-band answer.

Some thinkers draw the opposite lesson from forgetting and change: maybe there is no fixed self to carry through time at all.

A view from India: no-self: The Buddhist philosopher Vasubandhu argued for anattā: look inside and you never find a permanent 'I', only changing thoughts and feelings. The self is a useful label for a bundle of experiences, not a solid thing. Centuries later, David Hume reached a strikingly similar view in Europe.

Checkpoint: Two families of answer now sit side by side: continuity (a chain of memory carries you) versus no-self (there's no fixed you to carry). A strong essay weighs them, rather than assuming one.