16 She should know better than to poke the animal with her umbrella.
17 People need to know one another to be at their honest best.
18 He gave me a lot of flannel but I still don't know the answer to my question.
19 It's only fair to let her know that you intend to apply.
20 I need to know more about the job before I decide whether to apply for it.
21 I know from experience that he'll arrive late.
22 We know that taste in art is a subjective matter.
23 It is as well to know which way the wind blows.
24 By ignorance is pride increased; those most assume who know the least.
25 They assume most who know the least.
26 It's all too easy to assume that people know what they are doing.
27 He that would know what shall be must consider what has been.
28 We never know the love of the parents until we become parents ourselves.
29 No, I don't know his number-I have quite enough trouble remembering my own.
30 To know one's self is true progress.