the.com/lesson

What you get instead of what you wanted, usually too late to use it.

means Something you learn from study, experience, or instruction — often the hard way.

from From Old French 'leçon,' tracing back to Latin 'lectio' meaning 'a reading' — the act of reading aloud, which is how lessons were originally delivered: a text read out to be absorbed. The same Latin root, 'legere' (to read, to gather), also gives us 'lecture' and 'legible' — so a lesson was literally 'that which is read to you,' long before it became 'that which life makes you sit through.'

etymology
from latin legere, to read aloud
disguise
often just a mistake with better PR
shelf life
learned repeatedly, applied rarely
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