According to Business Insider, "While honest communication is crucial between you and your boss, some things are better left unsaid.
We talked to several workplace experts to see what they consider problematic phrases." A few pertain to politics. It's best to keep political opinions hush hush at the workplace. It's also important to have a hopeful and positive outlook, never say things like, "It's impossible." Especially, do not say the phrase, "I can't."