Reality contains not only evidence, but also the means (such as our minds, and our artefacts) of understanding it. There are mathematical symbols in physical reality. The fact that it is we who put them there does not make them any less physical. (Ch.3)
About this quote
- What does it mean?
- Deutsch says that reality contains both evidence and the tools—like minds and artifacts—to understand it, and that mathematical symbols are part of the physical world.
- In plain terms
- Our minds and tools are physical parts of reality that let us grasp it.
- What can you take from it?
- Treat mathematical models as physical entities, not just abstract ideas.
Where it applies
Putting it to work
Questions to consider
- How does treating symbols as physical change scientific practice?
- Do tools shape what we can know?
Another view
Not all symbols may be directly physical; some are conceptual shortcuts.
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