As a scientist, I reach conclusions
based on OBSERVATION and experimentation.
The Big Bang Theory Season 1, Episode 10
His OBSERVATION of high-energy positrons
has provided the first evidence...
The Big Bang Theory Season 2, Episode 11
True. I've had a similar OBSERVATION.
The Big Bang Theory Season 2, Episode 15
The OBSERVATION period
is almost over,
Westworld Season 2, Episode 4