Or where in the lay up it may/may not be. My guess is it wouldn't be on the surface or in any area with a high impact/high shock risk if it were even used.

How many CF failures have you seen in real life, in person that would make you question the materials properties & the engineers knowledge/design?

I've seen 2. A down tube that was cracked right across the middle. The customer said it was the bike/frame fault & thus sold a defective frame. When the return was refused, he left the store, put the bike on the roof rack & secured the rack hook directly to the center of the down tube where the crack was. Exactly the side to side load it was never designed to take. His rack was like bending a drinking straw...but it in his eyes it was Fuji's fault for making a breakable bike.

The other, some forks I over torqued with too big of a rotor. In this case it wasn't the material, I too was exceeding design in a manner not intended. Could've been steel, magnesium, aluminum. Material didn't matter.