Definition
This idiom describes someone who deliberately ignores advice or refuses to believe what they are told.
明知故同，装聾不听
I tried to explain the problem to him, but he wouldn't listen; it's like there's none so deaf as those who will not hear.
我试着向他解释这个问题，但他不愿意听；这就像那些不愿意听的人是最聋的。
She kept insisting her new plan was perfect, despite everyone pointing out the issues; there's none so deaf as those who will not hear.
她一直坚持她的新计划是完美的，尽管每个人都指出了问题；那些不愿意听的人是最聋的。
They warned him against investing in that company, but he did it anyway; there's none so deaf as those who will not hear.
他们警告他不要投资那家公司，但他还是做了；那些不愿意听的人是最聋的。