Final answer:
The phrase 'Not only was it a lively debate between two people, it also was an interesting dialogue' provides a complementary definition of the word dialogue.
Step-by-step explanation:
The word 'dialogue' refers to a conversation or discussion between two or more people. In the given sentences, the phrase 'Not only was it a lively debate between two people, it also was an interesting dialogue' highlights the aspect of dialogue. It emphasizes that the conversation between the two candidates was not just a lively debate but also an interesting dialogue.
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