I don't know what definition of bias you are referring to in all these bias threads Pat. In this thread, if you refer to the inclination of some architects to do something systematically in their designs, of course there is a bias. We all have these sorts of biases in many aspects of our lives.
If by bias you are talking about a tendency with prejudice that results in a systematic error or something that encourages a certain outcome over others that may be an improvement. A bias of this sort that results in an unreasoned judgment and is not a good thing, we all agree on this. So what's your point?
Did Ross exhibit a tendency to rout his courses from high tees to high greens? Yes. Do you have a problem with that? Did Ross tend to have a great deal of variety in his par 3s? Yes. Is that a problem? Did Macdonald and Raynor have a fairly narrow portfolio of hole designs? Yes. Any problems there? I'm not convinced it was such a great attribute but that's me.
Did Flynn have a tendency to make visible his bunkers? On hillsides? Absolutely. Did he hide bunkers? There are a number of examples where bunkers are hidden depending on topography. Flynn would rout his courses in many daring ways and often times he would do so perpendicular to topographical movement. Did he hide bunkers on flat ground? I can't think where. But where landing areas are hidden due to slopes, then of course he has bunkers that are hidden.
I can think of many examples some obvious others less so. There are at least one, possibly two bunkers depending on the tee used on the 10th hole at Rolling Green--245 yard uphill par 3 that cannot be seen. There are whole series of bunkers at Shinnecock that cannot be seen. Immediately comes to mind (because I landed in them the first time I played the course) are the bunkers on the landing area left of the 6th (Pond) hole. Its hard to tell where the fairway is from the tee on this hole.
In the less obvious category, the bunker right and short of the 7th hole at Huntingdon Valley. Flynn added a second bunker on the back/left side of the hill after the course opened(I think it is in the course evaluation that Ran did here on GCA) with an extension fairly far into the fairway that is no longer there. Tom Paul might correct me here, but I think that was fairly obscured from the landing area of the second shot on this great par 5. What Flynn was systematic about was that bunkers on hillsides were meant to be seen and he flashed these up to weigh more on the mind of the player.
Did Flynn have a tendency to use psychology and perception in his designs? Absolutely. As I said, he often wanted bunkers to stand out and play on the mind of the player. Sometimes he put bunkers (Kittansett and Indian Creek are great examples) 20-40 yards short of greens but built up the back edges so that they appear to be fronting the greens. Sometimes he used the overall movement of the land and green surrounds to make you think the green is severely sloped back to front when it is really front to back (3rd at Rolling Green and 4th at the Cascades).
Flynn wrote about a great many things. He did not stick to them universally although he did have a strong tendency to do many design concepts. For instance, he wrote about water and the detrimental effect it has on the recovery shot (one shot that he particularly valued--OK Pat, he had a bias for) but he used it effectively on occasions. In fact some of his early designs called for damming streams to create ponds. He wanted to do this at Kittansett (5th hole), he did it at Huntingdon Valley (5th and 13th), he wanted to do this at Rolling Green (15th), and there are many other examples.
Did Flynn have a bias for natural lines and not having abrupt slopes around tees, greens, and hazards? Not on his earliest projects (CC Harrisburg, 1916; Eagles Mere, 1917) but certainly universally afterwards. This became something he believed firmly in...mostly but not only because he appreciated the natural look but also because he proved that it was cheaper to maintain natural lines in the long run over artificial ones.
Did Flynn believe that the modern courses being constructed in his time should have trees on them? YES. He felt this for 4 reasons:
1. there were few if any sites available devoid of them
2. trees add beauty forming picturesque backgrounds and vistas
3. refreshing summer shade
4. practical value in separating holes
Too many on this website think there is no place for trees on a golf course. This is an example of narrowmindedness at best and at worst a bias that shows unreasoned judgement. Sorry redanman, but you're bias is definitely showing in this regard.
Your last question about whether they knew it. I would think they knew what they were doing. Do you think they'd need Pat Mucci or GCA to point it out to them?
Honestly Pat, I have no idea what you're talking about here.
I can't fathom why you would question the fact that there are tendencies in golf design. So I must assume that you question the negative implication of bias. Where do you see this bias in Flynn specifically or in other designers?