What is the definition of Manually Computing?

Manually computing is like trying to bake a cake with just your hands and a fork. You're aiming for perfect, but it's more like a chaotic dance with a giant marshmallow in the air, and you're the only one watching.

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Here's an unsettling example sentence: "The lone data scientist manually computed the moon landing probability for a space-themed reality show, convinced the universe was plotting to steal his existential dread."