are useful
They are useful.
Todos los modelos son incorrectos, pero algunos son útiles.
All models are incorrect, but some are useful.
Ciertos venenos, usados adecuadamente, son útiles.
Certain poisons, when used properly, are useful.
No todos esos libros son útiles.
Not all of those books are useful.
Las tarjetas de crédito son útiles pero peligrosas.
Credit cards are useful but dangerous.
No todas las cosas bonitas son útiles.
Not all beautiful things are useful.
Los muertos son útiles para los vivos.
The dead are useful to the living.
No todas las cosas de buen aspecto son útiles.
Not everything that looks good is useful.
Todos son útiles, pero, contigo a veces se me olvida.
They're all useful, but sometimes I forget that when you're around.
— Blade Runner 2049 (2017)