"We can't allow visitors into the production area because of safety reasons" which really was... we don't wan't any of you meddling kids to see that none of the machines have the ability to be plugged in.
What were the lies you are speaking of ... or was it something that maybe had to be reconsidered or was said based on present information that later became obsolete .... versus a lie at the prior time... Just saying that things should be clarified completely before somebody is portrayed as a liar or con artists etc ... Present the sequence of events that made it a lie versus just one statement that may have been made with a good conscience.