As we read Breisheit we come to realize that just about everyone lies, or is said to lie. And they eat and are still alive. We haven't left Eden yet, and already the lies show up. I'm sure I've left out more lies, but Breisheit is the book many kids learn as their first book. So they learn people tell lies.
Some lies are OK, some are questionable and some are outright wrong.
Others disagree that Abraham and Isaac did the right think. They are mixed over Jacob's lie to Isaac. They all agree Potiphar's wife was wrong. The Talmud tells us there are times to lie. One can lie for the sake of peace.