Question 1
Rohan says: 'Vikram has the pearl'
Vikram says: 'I do not have the pearl'
Ravi says: 'Rohan is lying'
Can all these statements be true simultaneously?
Let's test if all statements can be true:
Assumption 1: If Rohan tells truth, then Vikram has pearl.
But Vikram claims not to have it - contradiction if Vikram tells truth.
If Vikram lies, then Vikram DOES have the item - consistent with Rohan.
Then Ravi says Rohan lies - but we assumed Rohan tells truth - contradiction!
Assumption 2: If Rohan lies, then Vikram does NOT have pearl.
Vikram says the same thing - consistent if Vikram tells truth.
Ravi says Rohan lies - consistent if Ravi tells truth.
Therefore, all statements CAN be consistent when Rohan lies, Vikram and Ravi tell truth.
Thus, the statements are consistent.
Assumption 1: If Rohan tells truth, then Vikram has pearl.
But Vikram claims not to have it - contradiction if Vikram tells truth.
If Vikram lies, then Vikram DOES have the item - consistent with Rohan.
Then Ravi says Rohan lies - but we assumed Rohan tells truth - contradiction!
Assumption 2: If Rohan lies, then Vikram does NOT have pearl.
Vikram says the same thing - consistent if Vikram tells truth.
Ravi says Rohan lies - consistent if Ravi tells truth.
Therefore, all statements CAN be consistent when Rohan lies, Vikram and Ravi tell truth.
Thus, the statements are consistent.