Why?To make tester think before attempting to solve problems
My view.Logical proof can be given from two points – first is that you can prove that the statement is true. The other is that you can prove that it is false. In this case it is quite problematic to prove logically that the sun rises, due to the fact that rising sun is optical illusion as the earth rotates around its axis. But which is more important – empirical knowledge that the sun has been rising as long as mankind remembers or that some scientist claim that earth is spinning and rotating the sun?
Logical proof is based on simple rules – if the precondition is false then even logically true conclusion is also false. Plus few other rules.
I would suggest to use the other solution and show that the sun does not rise.
The following are the answers I received:
Tester 1:
It is clearly a matter of fact and it seems logical that the earth’s
rotation on its axis as it goes around the sun causes the effect of the
sun rising each morning. But will it also continue rising tomorrow? Our
belief is that the sun will rise tomorrow because it always has done in
the past. But the future cannot be deduced by the past, so it is logically
possible that the sun will not rise tomorrow. We have no rational basis
for believing that the sun will rise tomorrow also.
Tester 2:
Rising Sun is only an optical illusion.
Actually Earth is turning so, that observer is starting to see Sun appearing after it was hidden by Earth.
So this effect can't be logically proofed. But it can be described and repeatedly verified by observers.
Tester 3:
The proof that sun rises in the morning is based on the fact that sun has been observed to raise in a very large number of times. Also, the history has not registered any occasions where the sun did not raise in the morning. The third component in that logical proof might be that the rotation of the earth is always a constant. That tells us the sun should rise on an expected time, which we usually define as the morning. Altho this is a logical proof to the question, it does not prove the fact that sun will always keep rising(in the mornings).
Tester 4:
Tester has to be precise and accurate. He can't give logical proofs or sweet talk to fuzzy questions or some facts that are false.
It is known that Earth is spinning around the Sun and Sun can be seen when earth surface is towards it. It is also known that Sun can be seen at day and cannot at night. Also in the morning Sun can be first seen at east and last beams can be seen in the evening from the west (it is caused by the Earth rotation).
Therefore there isn't accurate answer to this foggy question because the Sun is not rising from anywhere in the mornings, Earth movement is causing the sunrise effect.
Tester 5:
by definition: morning is the period of time between dawn and noon.
Empirical knowledge gathered by our ancestors during the last 200,000 years, states that sun rises on planet earth.
Therefore: Sun rises in the mornings on planet earth.
Tester 6:
Sun doesn’t rise at all. The Sun is stationary. Earth revolves around the Sun and rotates around itself. Rotation of Earth around itself causes days and nights. Morning is just the name we've given to the time when Earth spinning makes the Sun appear at the beginning of the day.
Tester 7:
As the Sun is so enormously huge, then:
SUN + RISING = SUN SUN + FALLING = SUN
SUN + MORNING = SUN
SUN + EVENING = SUN
So:
RISING = FALLING
MORNING = EVENING
And also:
MORNING = RISING
EVENING = FALLING
As Earth is so tiny, then:
EARTH < SUN
We can add the same argument to both sides:
EARTH + MORNING < SUN + MORNING
EARTH + MORNING < SUN + RISING
So it shows that there are less mornings on Earth than there are Sun risings, meaning that on some morning the Sun won`t rise...
Tester 8:
First of all we we can not define the sunrise for the planet as a whole. The sun is always present for half the Earth,
so the sunrise can be only defined for a small area on Earth.
All planets in solar system spin around their center. One turn that earth makes, is considered one day. Morning
is defined by sunrise (when current location on earth turns toward the sun). So until the earth keeps spinning
there is sunrise. Whether we call this moment a morning or evening or with some other word is question on agreement.
