Please help, wonderful pedants. I'm using semicolons to separate a list of clauses, the last of which is preceded by 'and'. My colleague insists on a semicolon before the 'and'. But it doesn't sit right with me.
What's correct please ? The sentence is something like: 'Participants discussed the importance of healthcare; competition for jobs; efforts to reform the school system; and opportunities for youth" (but not that sentence!)
TIA