El niño era tan inobservante que no se dio cuenta de que su madre había cambiado de peinado.
The boy was so unobservant that he didn't notice his mother had changed her hairstyle.
Aunque era inobservante, su intuición le permitió notar detalles que otros pasaron por alto.
Although he was unobservant, his intuition allowed him to notice details that others overlooked.