Re: I'm confused (yet again)
OK, I'm not a grandmaster, but I used to be a county level player. So I know a bit about this.
If I had been playing a serious game, and the position was tricky, it would have been very useful to be able to adjourn to the loo with a pocket set to analyse the position properly, moving pieces around. (I've never done it, but I'm sure people have).
Nowadays, if you can disappear into the loo with a smartphone, you're doing the same - only with something that can analyse much more accurately and quickly than you can. Computers are particularly good at sharp, tactical positions, where a slight mistake can mean your position falls apart.
A GM, with a smartphone to help, playing another GM, would have an edge. Not enough to win every time, but enough to significantly improve his chances.