5.Cynics would probably tell you that the opposite of cynicism is gullibility, blindly trusting other people, and that cynicism is a sort of wisdom, a hard-earned sense that, in fact, people cannot be trusted.
6.I inquired about pound parties at the Creek, and my gullibility was verified. Yet the occasion had been truly a party, and the Townsends had done their best to make it festive.
7.The Brooklyn Bridge is also part of a popular expression, or saying, in English about " selling you the Brooklyn Bridge." The idea that you could sell someone the Brooklyn Bridge is used to indicate the gullibility of another person.