Tia and Mia are twin sisters.One of them is a liar whereas the other one is a truth teller.
I called their home number and one of them picked up.
I asked. 'Does Tia lie?' The person replied with a yes.
Whom did I talk with? Tia or Mia ?
I spoke with Mia.
Let us assume that Tia is a liar and Mia is a truth teller.
If I asked the question from Mia, the answer will be yes. If I asked the question from Tia, the answer will be no. Thus I must have asked from Mia.
Let us assume that Tia is a truth teller and Mia is a liar.
If I asked the question from Mia, the answer will be yes. If I asked from Tia, the answer will be no. Thus in this case as well, I must have asked from Mia.
