
We just want to keep her
a little longer for OBSERVATION.
The Big Bang Theory Season 7, Episode 15

I have a conclusion
based on an OBSERVATION.
The Big Bang Theory Season 1, Episode 10

That's not overconfidence.
That's OBSERVATION.
The Big Bang Theory Season 2, Episode 12

His OBSERVATION of high-energy positrons
has provided the first evidence...
The Big Bang Theory Season 2, Episode 11

As a scientist, I reach conclusions
based on OBSERVATION and experimentation.
The Big Bang Theory Season 1, Episode 10