Final answer:
The word that best fits the sentence is 'deviate', meaning to go against or differ from others' opinions.
Step-by-step explanation:
The word that best fits the meaning of the sentence is deviate. When someone deviates from the opinions of others, they go against or differ from those opinions. In this context, it means that the opinions of experts often differ from the opinions of others due to their extensive knowledge on topics related to their fields.
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