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