Distinguishing False Statements

Logic Level 1
  1. There is only 1 false statement in this list.
  2. There are only 2 false statements in this list.
  3. There are only 3 false statements in this list.

Exactly how many false statements are there in the list above?

0 1 2 3

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10 solutions

We can't have 0 0 false statements in the list since they all contradict each other, and thus at least two must be false. For this reason we also can't have 1 1 false statement.

We can't have three false statements for that would make statement 3.) correct, in which case we could only have a maximum of two false statements.

If we have two false statements, then statement 2.) is correct and indeed statement 1.) and statement 3.) are then false, so we have achieved a consistent result. Thus the only conclusion is that there are 2 \boxed{2} false statements.

We have the same thinking.

Francis Dave Cabanting - 5 years, 9 months ago

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Since the statements contradict only one of them can be true. Hence 2 are false

Dhananjay Dhole - 5 years, 9 months ago

Why cant all of them be false ?

Anton Schembri - 5 years, 4 months ago

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If they were all false then statement 3 would be true, thus creating a contradiction.

Brian Charlesworth - 5 years, 4 months ago

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Because it says "only 3" from the third statement this one is also false. So the corect answer to the question should be 3. To be a correct statement no.3 should be "There are 2 false statements in this list."

Stefan-Octavian Costache - 5 years, 2 months ago

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@Stefan-Octavian Costache Yes, statement 3 is false, since if it were true then, since there are only 3 statements in the list, it would also have to be false, giving us a contradiction. Statement 2 is equivalent to "there are precisely 2 false statements in this list", which is consistent with it being true as the other two statements would then be false.

Brian Charlesworth - 5 years, 2 months ago

Exactly what I thought too.

Avinash Kamath - 5 years, 7 months ago

I see what you are saying, however I read it more as quantifying the number of statements claiming falsity not as "determine which of these statements must be true".

Joe Bill Schirtzinger - 5 years, 4 months ago

Well, to me, the question is not complete, therefore it is not practical. It is about people's thoughts so no right or wrong then. I vote for 0.0

Adriana Batrisyia - 5 years, 1 month ago

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I totally agree with you. There is no reasoning that any statement should be false... other than a presumption that at least one is right and so therefore 2 must be wrong. I still vote for 0 too. :)

Lindsey Williams - 4 years, 9 months ago

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Well if none of the statements are false, that means they are all a lie. Also saying that 0 would be right makes everything contradict something. It is not about peoples thoughts as that is like saying 1+1=3 because I think so...

Adrian Angol-Henry - 3 years, 8 months ago

Because it says "only 3" from the third statement this one is also false. So the corect answer to the question should be 3. To be a correct statement no.3 should be "There are 2 false statements in this list." If you take out the word "only" then I agree that the correct answer is 2

Stefan-Octavian Costache - 5 years, 2 months ago

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"Only" means the same as "exactly" in this context. It means there are at least that amount, and no more. As there cannot be more than 3, indeed "only" in the last statement is not necessary, but it does also not make it wrong.

"Only", "precisely", or something along those lines is definitely needed in the first two sentences. Otherwise "there is one" does only mean that there is at least one, it might also be two or three, which renders the problem self-contradicting.

Roland van Vliembergen - 2 years, 1 month ago

I think it's just the fact that there are only two sentences that contain the words 'false statements' - the other sentence is 'false statement.'

Simon Deacon - 3 years, 9 months ago

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Ah, ok. Will have to pay attention to details. Thanks.

Brian Hogan - 2 years, 7 months ago

Depends on how many "Lists" there are. No definite meaning of what "Lists" means, is the term confined to "Lists" inclusive in each statement only, or is it a definition which means the whole group of statements reference to each other.

Michael Kelly - 3 years, 9 months ago

This is not a valid logical challenge because it uses circular logic. It can be argued there are no actual statements in this list at all since by definition a statement is a definite or clear expression of something, and there is nothing here that is being stated except a double negative.

Matt Bruce - 2 years, 9 months ago

So 3 sentences. Disregard the 3rd without reason?

Brian Hogan - 2 years, 7 months ago

they all gave different answers

Mxjd Ultimate - 1 week, 3 days ago

Meaningless drivel

Russell Harville - 4 years, 7 months ago
Chew-Seong Cheong
Sep 10, 2015
  • Statement 3: "There are 3 false statements in this list." cannot be true because if it is true then it contracts itself. Therefore there are at least one statement is false in the list.
  • Statement 1: "There are 1 false statement in this list." cannot be true, because if it is true then the false statement must be statement 3. Then statement 2 is true, which means that the other 2 statements including statement 1 are false.
  • Statement 2: "There are 2 false statements in this list." must be true.

Satisfactory explanation

Amol Kamble - 4 years, 7 months ago

I did the exact same process.

Colin Kennedy - 2 years, 10 months ago

I thought exactly the same thing...Why the answer is 2?? Oh dam, I got it... The question is how many false, not true :X

Raissa Camelo - 4 years, 11 months ago
Quang Minh Bùi
Feb 16, 2016

First, at most one of these 3 statements is correct, because they are exclusive of each other.

Second, there can't be all 3 wrong statements, because this implies the third statement is true and contradiction happens.

Therefore, there is only one true statement (and the other two are false). The answer is 2. (We must check the answer again then. If it's false, so the problem is illogic at the first place)

This is a actually a paradox with no correct answer. Each statement contradicts itself when it declares it is false. Each statement cannot know it exists so each becomes nullified. In other words, a statement cannot make a statement about itself without a valid point of reference. Like time travel; I cannot travel back in time and have 2 versions of myself.

Andrew Coyle - 3 years, 6 months ago

Minh You are genius, This is Tam (tamn1562@yahoo.com)

Tam Nolan - 3 years, 3 months ago
Colin Kennedy
Aug 11, 2018

If 1 is correct, then there is one false statement, which would be 3, there would also be a second true statement (2), which contradicts #1 (or the other way around).

If three is correct, then all of them are incorrect, including three, so there can't be three false statements.

If two is correct, then 1 and 3 are incorrect, meaning that there is nothing to contradict 2, and two doesn't contradict itself, which means the answer is 2.

That's the way I see it too. To me, It is not easy...

A Former Brilliant Member - 2 years, 6 months ago
Deepika V
Jun 16, 2017

If 2nd statement is true then 1st and 3rd statements are false. So there are 2 false statements....

Shreya Sinha
Sep 23, 2016

there cant be 3 false statements since the statement stating it has to be false then.but if we consider 2 false statements,then its probable because it may be the only true one while others are false.

Mxjd Ultimate
Jun 4, 2021

We can't have 0 statements because they all gave different answers. So only 1 is telling the truth (2), and the other 2 is not (1 and 3). So the answer is 2.

There are only 3 statements and only 1 can be true. If the first one's true, then the other 2 are false, which is not what the statement says. If statement three's true, then all of them are false, which also contradicts the statement. Hence, statement 2 is true because then statement 1 and 3 would be false.

Answer = 2 are false according to statement 2

Don Weingarten
Jan 31, 2019

Clearly, the statements cannot all be true, as they are all contradictory. But it is impossible that only one is true, since whichever one it is would automatically make the other two false. Similarly, they cannot all be false, as that would make statement 3 true, which is also contradictory. Thus there are two false statements; they are 1 and 3, and statement 2 is indeed true.

Dharik Anwar
Jun 3, 2018
  1. There is only 1 false statement in this list. => There is no false statements in this statement.
  2. There are only 2 false statements in this list. => There is one false statements in this statement.
  3. There are only 3 false statements in this list. => There is one false statements in this statement.

so totally two false statements are there in the lists

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