Thread: Cyclical Riddles

Originally Posted by ninja9578

[Hard]
Is this statement true or false? (Assuming that time travel is possible,) you can not kill yourself in the past because you would cease to exist in the present, and not be there to go back in time in the first place.

If assuming many universes, false
as the past "you" that you kill will fork the road in time, diverging away from the future you came from

if not, true

Originally Posted by ninja9578

[Medium]
True or False: This statement is always false.

False
although I can't really put words around the reason

it oscillates between true and false
therefore, overall it's false, as it is not "always" false

or something

Originally Posted by ninja9578

[Easy]
True or False: This statement is false.

Cyclical expression, can't resolve to either true or false

I thought more people would try these. Anyway here are the answers:

[Hard]
:p I tricked you. :p. The correct answer is 'No'.

Explanation: The question is a self referring interrogative statement. The part about time travel does not effect the answer. It is simply asking as yes or no question as where itself is either true or false. A question can not be true or false (only concrete statements can be,) so the answer is no.

If I had said "Is the following statement true or false," then you would have been right.

[Medium]
You were right, it's false.

Explanation: In because of the word "Always" all you need to do is find a single instance where it is true. If every instance is false, that means that one time it must be true. That's the counterexample, so it's false through induction.

[Easy]
Neither

In order for it to be false, then it must be true, which is a paradox.



I like brain teasers.