If no CVR or FDR then what next?
If the day comes where the CVR and/or FDR are not found (i believe they will eventually be found but perhaps not for a long time to come) what would be the next step toward solving this enigma? Will this be relegated to the "unsolved" files or do you think the accident investigators might approach it from a different way?
I'm curious as to how this may progress absent a CVR or FDR. (Without which I would imagine no definitive resolution would be possible?)