The unobservant waiter failed to notice the spilled drink until customers pointed it out.

Her habitual unobservantness caused her to miss the subtle clues at the crime scene.

The particle's properties were unobservable with the available equipment, leaving scientists to rely on indirect measurements.

The hacker modified the code unobservably to avoid detection.

Philosophers often debate the nature of the unobservable in metaphysics.

The unobservance of safety protocols at the construction site led to a preventable accident.

The unobserving security guard missed the suspicious package by the bench.

The unobserved butterfly emerged from the chrysalis at dawn, surprising the researchers.

She left the party unobserved, slipping into the night without saying goodbye.

Researchers proposed a model to estimate unobservables from the observed data.