I wouldn't exactly use this as a rule because when recalling memory/emotion I sometimes look in the direction of the "lying" indicator but this is still useful. As accurate as this may be, there are many trained professional liars. So be careful.
"I saw you in the street. Are you Annie? Yes." "Ted, are you acting out the last scene of Sleepless in Seattle with little dolls?" "How long have you been out here?" "Ten seconds." "Yeah. Just the last scene." -Ted and Robin, How I Met Your Mother