Byakugan can detect Lies

[Ansatsuken]

That's the point.

They can see chakra, Lying disturbs chakra, So the byakugan can see the disturbance in the liars chakra, Thus they can tell they're lying.

But its not natural right unlike Sensing. One need to train to recognize chakra pattern first. Right?

 

[Your Creepy Stalker]

My mom can tell when i'm lying, and as far as i know she doesn't have Byakugan.

 

[ANiMUS]

It pretty much just being observant :| anyone with eyes can do that