Although it cannot be said to be "stupid", the IQ of the British Shorthair Blue and White is indeed not high. This is because the British Shorthair Blue and White will inbreed in order to ensure the purity of their bloodline, which results in the British Shorthair Blue and White's IQ not being very high.
In fact, the British shorthair blue and white IQ is only equivalent to the IQ of a human being at one year old, and the number of learning times also requires a lot of. Breeders need to be patient in training cats and should not beat or scold them.