The politics of English usage can show up anywhere. I was reading Michael Connelly’s 2010 crime novel The Reversal – gradually working my way through his back catalogue – when I found it depicting the spread of prescriptivism.
LAPD detective Harry Bosch and his 14-year-old daughter, Madeline, are at breakfast:
He checked his watch. It was time to go.
‘If you’re done playing with your food you can put your bowl in the sink. We have to get going.’
‘Finished, Dad. You should use the correct word.’
‘Sorry about that. Are you finished playing with your cereal?’
‘Good. Let’s go.’
Harry leaves Madeline with Sue Bambrough, her vice principal, for babysitting. He takes the opportunity to consult with the teacher: