Is it possible for people who claim to be genuine and honest to actually not be? If so, why do they behave this way?

Read also:

• The workout supplement becoming more popular outside the gym - WTOP
• To a flat Earther, what's wrong with the idea that gravity is simply a force inherent to space which operates only in one dimension? Why do they go further and try to deny gravity rather than just saying it's different than physicists claim?
• Scientists warn that polar warming might alter ocean currents and cause massive flooding in the U.S. - Earth.com
• Why do men think I’m easy just by looking at me?
• Why do wives cheat on their loyal husbands?
• Indiana Pacers assistant Lloyd Pierce taking lessons for next opportunity as head coach - Andscape
• Whitesides says budget proposal shows the administration does not value NASA science - SpaceNews
• What makes a woman attractive?
• Jesse Armstrong’s HBO Movie ‘Mountainhead’ Gets Early Release On Max - Deadline
• Do you think cheating is that bad?
• Do you ever feel like you are doing good, but would do better if people hadn’t blamed you or even bothered you? I have gotten lonely, but I always am up to something (creating my destiny).
• Why do people hate Nickelback so much? What makes them different from other popular bands like Linkin Park, Green Day, etc.? Is it just because they're Canadian or what?