"Did you ever observe evidence of insanity in him?"

Scientists use their senses to observe and gather evidence or data.

Vince Calder Theresa- I think you have just observed evidence that it probably does not matter much.

Neither report observed evidence of an association between fruit intake and endometrial cancer.

And for the first time, scientists observed evidence of Lewy bodies.

Rusi Taleyarkhan and collaborators claimed to have observed evidence of sonofusion in 2002.

Instantly, he observed evidence that told him this apartment had recently undergone a thorough and most peculiar search.

Torres said, "Did you observe any blood-spray patterns or other evidence to indicate suicide?"

It develops theories of the world which best fit physically observed evidence.

Remarkably, we can potentially "see" or "observe" evidence of extra dimensions.