![It really doesn't matter
as long as it's challenging.
It really doesn't matter
as long as it's challenging.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
It really doesn't matter
as long as it's CHALLENGING.
The Big Bang Theory Season 10, Episode 22
![Oh, we'll make the puzzles
extremely challenging
Oh, we'll make the puzzles
extremely challenging](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Oh, we'll make the puzzles
extremely CHALLENGING
The Big Bang Theory Season 9, Episode 8
![Being your girlfriend is so challenging.
Being your girlfriend is so challenging.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Being your girlfriend is so CHALLENGING.
The Big Bang Theory Season 8, Episode 24
![I know what a challenging man he could be,
I know what a challenging man he could be,](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I know what a CHALLENGING man he could be,
The Big Bang Theory Season 9, Episode 14
![...indicating he's challenging
the ruling on the field.
...indicating he's challenging
the ruling on the field.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
...indicating he's CHALLENGING
the ruling on the field.
The Big Bang Theory Season 3, Episode 6