Readers, when you google this and click on the first link, this is what you find as the possible meanings of the idiom.
- Completely blind (although bats are not really blind). He lost his sight in an accident and is as blind as a bat.
- Not able to see well. I’m as blind as a bat without my glasses.
- Unwilling to recognise problems or bad things. Connie is as blind as a bat when it comes to her daughter’s disgraceful behaviour.
#1 and #2 are physical problems. #3 is a choice one makes
The OAG is #3 = Blind as a bat when it comes to the prime minister and ministers’ disgraceful behaviour.
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