I remember when my grandmother said that, that the white spots on the nails were for telling lies and it turns out that this is indicative of vitamin deficiency.
Many times, as you say no, something can be said to all people, and even more so if you don't know that they exaggerated. When I was at the university, they talked about García's message, we made a circle, the first person read the message and told the next person and so the wheel passed until it reached the last person, and it turns out that the message did not arrive the same as the one that was read, and that's life a rumor is acquiring different meanings according to who tells it and who interprets it,Thank God you already have a good relection with your cousin friend, and thank you very much for reminding me of this participation. God bless you.
RE: Telling the truth or not?