It is still a nonsense.
The depth of field has NOTHING to do with the sensor size. It's a simple thing (how did you express this? except for the mathematically challenged?).
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Once again, Gabor, you have forgotten that my concern is with the woods. Your concern appears to be only with the trees within the woods.
Without regard to such factors as composition and FoV, you are perfectly correct that DoF has nothing to do with sensor size. But my compositions and images have a lot to do with sensor size. The sensor size influences my choice of focal length and the perspective from which I take the shot, and that in turn influences DoF.
I'm surprised you find such ideas nonsense. It's pretty basic to me. I'm dealing with such issues all the time.
Edit: For the sake of clarity, I should elaborate on what is probably a source of much confusion. I have assumed in my comments that most users of DSLRs wish to maximise the real estate of their sensors. The people contributing to this thread are obviously concerned about resolution. If you are concerned about resolution, you don't use a 50mm lens and then crop the resulting image to the same field-of-view you would have got using an 80mm lens from the same position. You try to use an 80mm lens, even if it's a zoom of lower quality than the 50mm prime.
If two photographers are standing next to each other, one with a 20D and 50mm lens, and the other with a 1Ds3 and 50mm lens, and they shoot the same scene using the same F stop, then the parts that both images have in common, will, of course, be very similar in terms of both resolution and DoF,
but the compositions will be very different.
Most photographers carry a range of lenses or a zoom with a range of focal lengths. People who claim that DoF has nothing to do with sensor size are being very disingenuous.