Silent lies

A lie is an obvious enemy of a seeker of truth.A Gurmukh and a lie are incompatible.Let us identify some silent lies
1-Putting up an artificial smile when not really happy is telling a silent lie.
2-Dying the hair and the beard is like telling the people that one is not fifty year old but slightly more than twenty and hence is a silent lie.
3-A sikh wearing a cap instead of a turban is hiding his identity and hence a lie.