Acatalepsy
noun /ˌækəˈtæləpsi/ — The recognition that full certainty is beyond human grasp.
Definition
The impossibility of truly comprehending the universe — the philosophical position that complete certainty and full knowledge are permanently beyond human reach.
Beyond the definition
Acatalepsy is either terrifying or liberating, depending on your temperament. The universe cannot be fully known. You will never have all the information. And somehow, life continues — perhaps more honestly once you've admitted this.
Origin & history
From Greek akatalepsia (incomprehensibility), from a (not) + katalepsis (seizure, comprehension, grasping). A term from ancient Skeptic philosophy — Pyrrho and his followers used it to describe the limits of human knowledge.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
He lived with acatalepsy comfortably — the not-knowing was part of what made existence interesting.
Acatalepsy is not ignorance. It's the wisdom to know what you can't know.
She found acatalepsy strangely peaceful: the universe was under no obligation to be legible.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Acatalepsy” when the meaning fits your context: The impossibility of truly comprehending the universe — the philosophical position that complete certainty and full knowledge are permanently beyond human reach.
Synonyms
unknowability, epistemic humility, incomprehensibility, cognitive limits
Antonyms
certainty, omniscience, comprehension
Related words
Word in the Wild
Illustrative story: an imagined scene, not a documented event or interview.
The philosopher had spent forty years trying to establish what could be known with certainty. At eighty, she gave a lecture called "The Limits of Knowing" and said something her students would repeat for years afterward.
"The longer I have studied knowledge, the more I have become a student of its edges. Every time I thought I had found the solid ground, there was more ground beneath it, and beneath that, more. I no longer believe in a bedrock. I believe in careful, continuous attention to the uncertainty."
She received her honorary degree with characteristic equanimity. She had never found the certainty. The search had been the whole point.
Questions about this word
What does "Acatalepsy" mean?
Acatalepsy is noun meaning: The recognition that full certainty is beyond human grasp.. The impossibility of truly comprehending the universe — the philosophical position that complete certainty and full knowledge are permanently beyond human reach.
Where does the word "Acatalepsy" come from?
From Greek akatalepsia (incomprehensibility), from a (not) + katalepsis (seizure, comprehension, grasping). A term from ancient Skeptic philosophy — Pyrrho and his followers used it to describe the limits of human knowledge.