Detecting design or intent in nature

[Heywood]

Lets look bird nest evolution. Pendulous nests evolved from pensile nests. Pensile nests evolved from cup nests. The evolution from cup nest to pendulous nest happened over thousands of generations. It is not a man made system, but it required the intellect of the bird. Your claim that all systems which appear to require intellect are man made is false.

If you accept Chas's definiton of biological evolution, "the imperfect replication of replicators" you cannot then say birds nest evolution is biological evolution. Birds nests do not reproduce.

Okay, if you want to call bird actions "intellect," then it's no sweat off my nose. I'd call them "instinct," but whatever.

I do consider instinct to be a form of intellect. Somewhere in this thread we talked about whether or not a paramecium had intellect. Anyways your claim that bird actions are all instinct is in doubt.

Study suggest birds learn to build nests

What I would like to see done is this experiment. Take eggs laid in a pendulous nest and hatched them in a cusp nest. Would that generation of bird build a pendulous nest or a cusp nest? If it built a cusp nest indicating it had learned nest design I doubt you would yield.