Liddy will never be easy until she's exposed herself in some p | English by mistakes

Liddy will never be easy until she's exposed herself in some public place or other, and we can never expect her to do it with so little inconvenience as under the present circumstances.

Use certain + noun when you continue (or could continue) by giving
details: 'There are certain advantages to living in the countryside, the most important being the fresh air.'
'I'm not allowed to eat certain types of seafood, especially squid and octopus.'

Use some + noun (+ or other) when you cannot or do not wish to give
details: 'In the end, he sold it to some second-hand car dealer.'
'If the factory is shut down for some reason, what will happen to all the workers?'

The phrase some + noun + or other is often used in informal styles to suggest that the person or thing is completely unknown to you and not worth thinking about: 'Apparently, their daughter has got engaged to
some shop assistant or other.'