Which prepositions are used in which situations is highly idiomatic. He lectures on the topic of the effects on welfare policy, but he lectures in sociology.
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AnonymousI have no idea why 'in' has been used here!Does the original poster intend to remove the preposition "in". Well, then the sentence will not make sense.
Any help is welcome!
'Joe Bloggs lectures in sociology at the University of Harvard' (Obviously, I've removed the key details...)
Thanks
lectures in/on Cybernetics