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Although for general high school Mathematics we would say the probability that the sun will rise tomorrow is:

  • 1
  • Certain
  • 100%

The dot above the 9 in the picture below meaning "recurring". So it means 99.99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999%

99.9% because the sun will probably rise but there is a tiny probability that it could burn out over night which is highly unlikely.

The sun neither rises or sets it only appears to do so because the earth takes one day (24 hours to rotate on its axis). It only appears to an observer on earth that the sun rises and sets. It has appeared to do this for as long as the earth has existed (approx. 4.5 billion years), although of course humans have only been around to see this for around 3.5 million years. Scientists believe that the sun will continue to burn for perhaps  another  4.5 billion years but life on earth will be extinct long before that.

 As for the probability that we will have the impression of the sun rising tomorrow, on a scale of 0 -1 this would be 1 i.e. it is certain.


Tom Hannon 

The probability that the sun will rise tomorrow is 1.

1 because it is a certainty.  All probabilities lie between 0 and 1 where 0 is impossible and 1 is certain or sometimes probabilities are expressed as percentages so that would be 0% to 100%

anything that definitely will happen has a probability of 1..unless there is a major catastrophe and the sun falls!! (so should we say 0.99999?) probability always runs on a scale from 0-1 (using decimals in between) If something could never happen it  would be 0..my children say that Tottenham being at the top of the football table is 0.5? who knows??

The Sun will always rise therefore has a probability of 1

The probability that someone come up tomoroe is 1. 1 being certain.

In principle there must be a vanishingly small probability that some previously unknown phenomena will stop the Earth turning in the next 24 hrs, and the sun will not rise. But, for all practical purposes, I would say the chance of the sun rising tomorrow is 1.

Saying tomorrow puts an upper limit on our time scale of 24 hours. This in turn restricts the cataclysmic event to having to occur within our extended solar system. From our understanding there is absolutely no way possible that such an event could occur within our solar system given its current state. So we are left with requiring a physics-breaking event to occur within our solar system.

As a result, the probability that the sun will rise tomorrow is 1 with an error smaller than anything you can possibly begin to imagine. I'll whack a very conservative upper limit as 1x10^-100 for you though!

it is 0.5


The chances cannot be 100% though, I think. As there is a chance (no matter how remote or unlikely) that this cataclysmic event might happen, so the chances I think, must be 99.99% (recurring). What do you think?

Stars, like our sun, are born and die. Some scientists reckon that the Sun will fizzle out in 5 billion years time. So assuming that there isn't some cataclysmic event, then the chances must be very high that the sun will rise tomorrow.

The chances are very high, but are they 100%? What do you think, and why?

most deffinet

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