Who Can Swim?
Only one of the boys (Abel, Ben, Carl) can swim. They made these following statements and only one of them is true:
- Abel: "I can swim."
- Ben: "I cannot swim."
- Carl: "Abel cannot swim."
Who can swim?
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1 solution
Moderator note:
Good solution. I've edited it slightly to make it it clearer that we're considering these 3 cases.
Since we know that only 1 person is saying the truth, we will consider cases based on whom is telling the truth.
We first see if Abel is saying the truth:
If A can swim, that means B is also telling the truth, which in this case this is out.
If B is telling the truth:
C says that A cannot swim, in this case this case is also out.
If C is telling the truth:
So, the answer is Ben can swim.