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

that could reconcile the lack
of OBSERVATION of supersymmetry
The Big Bang Theory Season 12, Episode 5

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

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

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