I'm sure there are signs.
Most Helpful Guy
There are signs indeed, but it's not a complete science.
Small body movements, such as fidgeting with something
or perhaps having trouble keeping eye contact.
Those are signs of being nervous, which could
mean that something is amiss.
But there's no definite way
to determine if people lie.
Even lie detectors look for an increase
in a persons heart rythm/pulse.
All we can do, is try. ^.^0
Most Helpful Girl
They look physically uncomfortable (shifty eyes, fidgety hands, etc), try to change the subject, of if what they're saying just doesn't add up.0