What use is half a wing? (Talk.Origins)

Claim CB921.2:

What use is half a wing? A leg evolving into a wing would be a bad leg long before it was a good wing.

Source:
 * Brown, Walt, 1995. In the beginning: Compelling evidence for creation and the Flood. Phoenix, AZ: Center for Scientific Creation, p. 7.

CreationWiki response:

It needs to be noted that this claim is not found at the cited source. Brown does talk about the impossibility of going from a reptile’s foreleg to a bird's wing but nowhere does he make such a general statement.

Yes, some insects use their wings for skimming rapidly across the surface of water but they are still fully functional wings. Even if the insect can’t fly it is getting enough lift and power to keep out of the water.

None of these are a half wing; most are actually more like parachutes. In each case they are simply able to increase their surface area so as to slow and in some cases even control their fall.

All this shows is that wings can be used for purposes other than flight. None of these are half wings; they are all fully formed and functional wings they are just not all used for flight.

This is nothing short of a 100% act of faith. It actually shows that the claim as written is 100% true. If some day an animal that really has a half wing is found to have a use for it then Talk Origins would have a point. Otherwise they have no evidence that a half wing would have a function.