Traditional ‘where’s your grammar?’ line
(“in t’front room watching telly, what’s it to you?”)
An apparently valid study has shown that 25-34 year olds are best at using apostrophes correctly, while over-55s are worst. While this doesn’t fit with the traditional narrative of ‘it’s all gone to the dogs since trendy liberals took over teaching’, it does fit with the available evidence on functional literacy rates: it’s clear that the comprehensive system has provided its alumni with a more effective education than the grammar and secondary modern system did.
I’m aware that ‘bring back grammar schools’ is a dogmatic, rather than an evidence-based, position – but one might have thought the fact that older people are demonstrably worse-educated than younger people might impinge on their consciousness somewhere down the line…