Capítulo 1368: Trident of Poseidon II

  'I don't think she would lie to me but what do you think?' Will ask Azief. Azief shakes his head and said

'I don't think she would do that either. Not to mention it is easy for us to confirm it' 

Azief knows that one of the price that she had to pay because of her ability of seeing the future was that she could not lie.

Of course, this also has a loophole. It is not entirely accurate to say she could not lie. The thing is she could not lie about the future she had seen.

This has something to do with Oracles and Seers that connected with each other over this certain clairvoyance force.

Like all Speedster are connected to the Speed Source, Oracle, Seers, clairvoyance whatever you want to call them is connected to a source that is present in all realties and in all universe

And this force imposes rules. There is a reason why Will could easily break through space and time when he is not even Divine Comprehension level.