Lerp node documentation might be wrong

Lerp node documentations says that:

A - Input is white.

B - Input is black.

However. I’ve been looking at ML_Metal_Dark from Blueprint Example, and playing with the roughness value. When I change A input it clearly respond to the darker part of the texture, (blacks) while changing B input responds to light part of texture (whites).

Is there something I’m missing or this is indeed an bug in documentation ?

edit:
Even screenshot on the same page shows that the inputs work in opposite.

Can you point out which page that is on in the documentation? It definitely sounds like it has those reversed and I’d like to get that fixed.

https://rocket.unrealengine.com/docs/ue4/INT/Engine/Subsystems/Rendering/MaterialsAndTextures/Materials/ExpressionReference/Math/index.html#LinearInterpolate

Here.

Thanks. We will look into it.

Still the same bug