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For each of the following wffs, identify the main logical connective. If more than one of the same connective is present, specify which you mean. (2 pts each) \text {

16. } \neg A \wedge \neg B \text { 17. } A \vee(B \vee C) \text { 18. }(A \wedge(B \vee C)) \vee D \text { 19. } \neg(\neg A \Longrightarrow(B \wedge C)) \text { 20. } \neg \neg A \text { 21. }((A \Longrightarrow B) \wedge(B \Longrightarrow C)) \Longrightarrow(A \Longrightarrow C) \text { 22. }(A \wedge B) \wedge \neg(B \wedge C) \text { 23. } A \vee((B \Longrightarrow C) \wedge \neg(D \vee E))

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