For specific answers to your first and second questions, you would do better to consult Meyers’ writings than to listen to my attempts at paraphrase; but I shall offer an argument in the form of a hypothetical illustration that, I think, demonstrates something despite its hypothetical character. Consider:
Scenario I: Suppose that in 1835 ( I am altering history for the purposes of clear illustration ) archaeologists had dug up from the sands of Mesopotamia the first cuneiform tablets seen since ancient times. Extraordinary, says one scholar, an unknown script. I shall copy these markings, publish them, and perhaps soon we shall decipher them and increase vastly our knowledge of ancient times.
Oh scoffs a colleague, what a fanciful notion. These are just natural formations, brought about by the action of wind and water.
Who would be taken seriously? The second scholar would be laughed at and dismissed. Why? Because cuneiform, even to those who cannot read it, is clearly intelligently designed. The hypothesis of artifice would be the only one taken seriously.
Scenario II: biologists discover a bewildering array of complex structures and processes in the cell: Flagella, mitochondria, the genetic code itself. One biologist says, This stuff looks intelligently designed to me.
His colleagues respond with outrage. That is unscientific they yell, intelligent design can never be a legitimate explanation in science. It is of the nature of science that we employ as hypotheses only natural processes.
In one case intelligent design is considered to be the only sensible hypothesis; in the other case ID is considered out of the question. What is the difference between the two scenarios? There is only one answer: mainstream scientists believe in human beings ( the putative creators of cuneiform), and they do not believe in God. They know that intelligent design occurs sometimes, but they reject such an explanation whenever it would imply God’s existence. We are faced here with nothing more or less than a dogmatic prejudice against theism — masquerading, of course, as objectivity.
The moral of the story is that we often recognize design without trouble, but when the design hypothesis offends a cherished dogma — in this case, atheism — suddenly no amount of evidence for design is deemed sufficient.
With regard to your third question, Taq, it is true that intelligent design is hard to falsify. In the case of the cuneiform tablets, to show that they are not intelligently designed, one would have to provide a detailed scenario of how they might have been formed by geological processes, and preferably show through experiment that wind and water could form such things. You are welcome to raise the question of burden of proof if you wish, but I warn you that the issue is more complicated than any treatment I have encountered.