It from Bit
Wheeler's proposal: maybe information is the bottom layer, and matter is derived from it — not the other way around.
If you take anything apart all the way — a table, a star, a thought — what do you find at the bottom? The standard answer is particles. But the physicist John Wheeler proposed something bolder: "It from Bit" — that at the bottom there may be not matter but <em>information</em>, and that matter is derived from yes/no answers, not the reverse.
Level 2 The explanation▾
Wheeler coined the phrase to express the idea that every item of the physical world has, at bottom, a "non-material" source: answers to yes/no questions, acts of measurement. This is a serious proposal from a first-rank physicist, but it is a founding idea, not a confirmed result.
A critical precision. Wheeler spoke of yes/no questions and the role of measurement — not of a "consciousness field." When using him one must say precisely: he inspired the idea that "reality arises from information," and claimed no more than that.
Level 3 Deeper▾
Speculation The leap from "It from Bit" to "the universe is consciousness" or "everything is information in the sense of meaning" is not Wheeler's and does not follow from physics. It is a metaphysical extension, and its place here is framed.
If at the bottom of the breakdown a list of numbers remains, the honest question is: have we discovered what the world is made of, or only the most precise language we have for talking about it? The site holds that distinction open.
Framing
"It from Bit" is Wheeler's founding idea on the role of information/measurement at the base of physics.
What is open
Whether information truly precedes matter — there is no experimental verdict.
Off limits
That Wheeler claimed a "consciousness field," or that physics proved the universe is made of consciousness.
Level 4 Sources▾
- Wheeler, J. (1990). Information, Physics, Quantum: The Search for Links — statement of "It from Bit."
- The debate on measurement and the observer in quantum theory (does not require "consciousness").
- The extension to "universe as consciousness/information-as-meaning" — marked speculation.