Have bats in the belfry and Of unsound mind

Of unsound mind and have bats in the belfry are semantically related. In some cases you can use "Of unsound mind" instead an adjective phrase "Have bats in the belfry".

Of unsound mind adjective - Not of sound mind, memory, or understanding; in law, not competent to go to trial.

Have bats in the belfry and of unsound mind are semantically related. You can use "Have bats in the belfry" instead an adjective phrase "Of unsound mind".