A change in quantity demanded occurs because of a change in the price of the product. It is indicated by a movement on the same demand curve. There is an inverse relationship between quantity demanded and price of a product while other factors remain constant. So when price increases, the quantity demanded falls and vice versa.
A change in demand occurs because of a change in other factors while the price of the product remains constant. This is indicated by a shift in the demand curve. The other factors are the price of other goods, tastes, and preferences, the income of the consumer, etc.
Claim 1 is a counsel of prudence. It says that the consequence of lying is to the person lying. And that whatever benefit derived from lying is cancelled out later on when the truth comes out.
Claim 2 On the other hand is moral. Because it warns of the general negative effects of lying.
