Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.

Imagine, if you will, a world where no one could agree upon what constitutes the color red. You'd point at something  — a firetruck, maybe — and ask passersby if that was red, and they'd say it was probably was.