[ToryHeartland]

Relying on or derived from observation

Whether one agrees with ToE or not, it is nonetheless empirical and derived from observation; some may wish to challenge the interpretation of those observations, but that is another matter.

If I observe that the little button inside my refrigerator must inevitably be depressed by the action of closing the door, that is an observation that convinces me the light is switched off when the refrigerator door is shut (though that is something I cannot directly observe).

[GrandEagle]

To some extent I agree. You example of the light in the refrigerator is far less complex that evolution, but the point is well taken.
In this case, we form a hypotheses that the light really goes out when we close the door. Se push the button and observe that the light goes out. We observe the spot on the door edge and from what we already do know, we form an hypothesis that when we close the door the button gets pushed.
evolution tests things that we do know, for example the tests using a virus, bugs, different DNA tests, etc. The results of the tests, if not skewed by the scientists desired outcome, are scientific. What is in fact theory, is the end hypothesis that the various test show that life can evolve from (you insert the item). Since there are many, many more parameters involved, I don't think that the refrigerator example is very applicable.
I might also add, that in every test, the scientist does something to cause a result, which does show design. Something which most evolutionist deny - although not the topic of this thread I'll admit.
That different organisms mutate can be tested. That designing in some DNA changes cause the expected result from time to time can be tested and observed, that various animals adjust to their environment is observable. But that one kind of animal can become another kind of animal is a big jump from what has been tested, much less that life came from (whatever you insert the item).
The deductions that scientists conclude from things that are testable are just that - deductions. Very subject to interpretation of test results and the scientists own personal bias.

Cordially,
GE

[RogueIsland]

If I observe that the little button inside my refrigerator must inevitably be depressed by the action of closing the door, that is an observation that convinces me the light is switched off when the refrigerator door is shut (though that is something I cannot directly observe).

But... but... it's possible that in actuality God is turning off the light and he just designed your refrigerator so that it looks exactly like your light is being switched off by the little button. It is only your atheist, secularist, matarialist bias and your desire to do drugs and consort with loose women that blinds you to this truth.

[Elsie]

(though that is something I cannot directly observe).

Spare no expense!

Get a bigger 'fridge!!! ;^)