"On the other hand, we don't understand the theory too completely, and because of this fuzziness of spacetime, the very concept of spacetime and spacetime dimensions isn't precisely defined"
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Even from the most famous living theorist, there is a jolt of humility here: spacetime, the thing physics usually treats as the stage, is being demoted to a rough draft. Witten’s phrasing does two jobs at once. It reassures the reader that “fuzziness” isn’t poetic license but a technical diagnosis, and it quietly indicts our default metaphors. If the theory isn’t understood “too completely,” then spacetime dimensions - the proud integers we build textbooks on - may be bookkeeping artifacts rather than bedrock.
The intent is less to mystify than to relocate certainty. Witten is speaking from the frontier where string theory, quantum gravity, and high-level geometry collide, a place where you can compute with astonishing precision yet lack a settled ontology. “On the other hand” signals an internal debate: yes, these frameworks explain a lot; no, they don’t yet tell us what the world is made of in clean conceptual terms. The subtext is that physics is still negotiating what counts as fundamental: fields? strings? information? Something even less intuitive?
Context matters because Witten’s authority comes from making math do physical work. When he admits spacetime isn’t “precisely defined,” it’s not defeatism; it’s a warning about premature realism. The rhetorical power lies in its inversion: instead of claiming a new dimension, he questions the definition of “dimension” itself. In a culture that treats more data as the cure for uncertainty, Witten is pointing to a different limit - the possibility that our core nouns are the problem.
The intent is less to mystify than to relocate certainty. Witten is speaking from the frontier where string theory, quantum gravity, and high-level geometry collide, a place where you can compute with astonishing precision yet lack a settled ontology. “On the other hand” signals an internal debate: yes, these frameworks explain a lot; no, they don’t yet tell us what the world is made of in clean conceptual terms. The subtext is that physics is still negotiating what counts as fundamental: fields? strings? information? Something even less intuitive?
Context matters because Witten’s authority comes from making math do physical work. When he admits spacetime isn’t “precisely defined,” it’s not defeatism; it’s a warning about premature realism. The rhetorical power lies in its inversion: instead of claiming a new dimension, he questions the definition of “dimension” itself. In a culture that treats more data as the cure for uncertainty, Witten is pointing to a different limit - the possibility that our core nouns are the problem.
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| Topic | Science |
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