the.com/lucidity

The brief window when your brain admits it has no idea what is happening, then fixes it anyway.

means The quality of being clear and easy to understand, especially a sudden clearness of thought or perception.

from From Latin lucidus, 'clear, bright, shining,' rooted in lucere, 'to shine' — the same root that gives us 'lucid,' 'lucent,' and 'translucent.' Latin speakers used lucidus both literally, for sunlight and gleaming surfaces, and figuratively, for minds that saw things clearly. English borrowed it in the 1600s mostly for the figurative sense — a light-metaphor for thought so old and natural it barely feels like a metaphor at all.

etymology
From Latin lucidus, meaning full of light
medical use
Dying patients sometimes regain it unexpectedly, called terminal lucidity
dream version
Lucid dreamers can control plot while brain insists its real
irony
Hardest to achieve exactly when you need it most
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