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Questions tagged [paradox]

A puzzle in which a seemingly impossible situation is presented, or any sort of construction that results in a logical contradiction.

5 votes
2 answers
1k views

Football Pass Rate Paradox [closed]

There are 2 teams - Team A and Team B. Both teams play 2 matches. In both matches, Team A has a higher pass rate than Team B. Can the overall combined pass rate for Team B be higher than that of Team ...
quantrader23's user avatar
45 votes
12 answers
7k views

Explain this incorrect proof that 3=0

Consider the quadratic equation $x^2+x+1=0$. $x=0$ is not a solution to this equation, so it is safe to divide both sides by $x$. $x+1+\frac{1}{x}=0$ Rearrange: $x+1=-\frac{1}{x}$ And substitute into ...
ApexPolenta's user avatar
  • 3,318
2 votes
1 answer
314 views

Is this a solution to the unexpected hanging paradox?

I once wrote an answer to Unexpected hanging paradox that went something like this "In the context of the unexpected hanging paradox, being hung by surprise is defined to mean he couldn't deduce ...
Timothy's user avatar
  • 145
-9 votes
1 answer
137 views

a simple paradox [closed]

This is probably the simplest paradox out there and it still confuses me, here it is. The sentence below is true. The sentence above is false. I've known about this one for a few years and it has ...
Parkerdaboss216's user avatar
12 votes
1 answer
426 views

It's All Paradox - Or Is It?

Transcription: ...
Shivansh Sharma's user avatar
0 votes
1 answer
280 views

Is the unexpected hanging paradox really a paradox? [duplicate]

The unexpected hanging is described in the Wikipedia article Unexpected hanging paradox. A hanging is said to be a surprise of on the morning that the prisoner is hanged, he cannot deduce that he ...
Timothy's user avatar
  • 145
-7 votes
1 answer
157 views

Omnipotence Paradox [closed]

God has limitless power. So can he/she create a stone so heavy the no one lift it ? If yes, then god himself/herself can not lift it, so limited power. If no, then there's a limit to what god can ...
Mike Karter's user avatar
-2 votes
1 answer
156 views

Death cause Paradox [closed]

In the sentence: "Two guys killing themselves by jumping out of a roof" What is the actual death cause? the roof or themselves?
HQSantos's user avatar
1 vote
2 answers
296 views

The faster you walk

The faster you walk, the quicker you'll get there, it's true. But be warned, it's not without a price, for the faster you go, the further you'll have to walk before you arrive.
Mason Wheeler's user avatar
9 votes
4 answers
2k views

Who wins in this tic-tac-toe game?

Question sourced from Brilliant.org Jack and Jill are playing Tic-Tac-Toe, with Jack being Os and Jill being Xs. Now, being perfectly logical beings narrow-minded one-move-foresight beings, they move ...
Wen1now's user avatar
  • 9,253
-9 votes
6 answers
321 views

Average of a Series

The "average" of a series is x. A new data point comes in with the value x + 1. But the new average is less than ...
Ajay Brahmakshatriya's user avatar
7 votes
6 answers
2k views

I exist, but I do not. I change, but I do not

I am a tool but I do not really exist I am always used, even when I am not The people that truly benefit from me are those that have trouble using me I am found everywhere, but I haven't always ...
silenceislife's user avatar
50 votes
7 answers
11k views

How many tries to roll a 6?

Suppose you roll a (fair, 6-sided, perfectly ordinary) die repeatedly until you roll a 6. As is well known, the expected (i.e., long-term average over many trials) number of rolls required is 6. Now ...
0 votes
2 answers
112 views

Help me with these meta questions [closed]

I’ve been thinking about these questions and I wonder what multiple people would write if they can do so in a paragraph or two. Question 1 : What is the answer to this question? Question ...
Zaki's user avatar
  • 21
3 votes
3 answers
557 views

Do Magicians Really Exist?

Disclaimer: I am not affiliated with the following two users in any way: What I would like to know is: Does the following paradox have a name? What is the fallacy of the argument? If possible, where ...
boboquack's user avatar
  • 22.1k

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