Is there a definitive measurement in the universe?

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Discussion Overview

The discussion revolves around the nature of measurement and uncertainty in the universe, questioning whether there can be definitive measurements in physical quantities such as length and time. Participants explore the implications of uncertainty in measurements and the potential sources of this uncertainty, including both human error and inherent limitations of the universe itself.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants assert that every measurement carries uncertainty, exemplified by the limitations of measuring devices and the inherent variability in physical quantities.
  • Others question the utility of categorizing uncertainty as stemming from either human error or the universe, suggesting that this binary may not be helpful.
  • Heisenberg's uncertainty principle is mentioned as a significant factor at microscopic levels, contributing to the broader discussion of measurement uncertainty.
  • One participant proposes that the search for certainty in measurements may be misguided, attributing this to the mathematical frameworks that imply absolute precision which may not exist in reality.
  • Another participant emphasizes the lack of an exact measurement in the universe, suggesting that the absence of perfect rulers and the variability of physical objects contribute to measurement challenges.

Areas of Agreement / Disagreement

Participants express varying views on the sources of measurement uncertainty, with no consensus reached on whether uncertainty arises from human error, limitations of measuring devices, or the nature of the universe itself. The discussion remains unresolved regarding the implications of these uncertainties.

Contextual Notes

Participants highlight the limitations of measurement tools and the philosophical implications of seeking absolute precision, but do not resolve the underlying assumptions about the nature of measurement and uncertainty.

Quarlep
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In Every measurement there must be uncertanity.In length or In time everything.Lets assume we have a ruler and a rope.If I measure the rope I get a result but I can't say this is exactly true because there's a unncertanity in measurement.Lets suppoe the rope is 100 cm minus or plus 0.5 mm.The same thing as time or mass and another measurable things.Here comes my question Who are the the source of this error ? We or the universe.

Thanks
 
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What would "the universe as source of uncertainty" (error is doing something wrong) mean?
I don't think it is useful to look for a source with those two categories.
 
There is some uncertainty due to limitations of our measuring devices. There is also Heisenberg's principle, but this is significant primarily at microscopic levels.
 
mfb said:
What would "the universe as source of uncertainty" (error is doing something wrong) mean?
Is there a body length of the exact number ? No, so there's uncertainty in measurement Here comes my question in universe there's exact length and we can't measure it exactly or there's no exactly measurement that's why we can't measure it.
 
I would say that people are 'in error' when they look for certainly in anything. It may be the fault of the Mathematics we have developed, which seems to indicate an absolute precision that doesn't really exist in the Universe.
How many beans make five?
 
I got it.I am agree with you.
 
Quarlep said:
Is there a body length of the exact number ? No, so there's uncertainty in measurement Here comes my question in universe there's exact length and we can't measure it exactly or there's no exactly measurement that's why we can't measure it.
There are no perfect rulers because there is no clear way to define where exactly objects end, and even if there would the length would constantly change back and forth a bit.
 

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