now this is weird to me.
Ponting's output in England is better than Kallis's output in England, Ponting's work in Sri Lanka is also higher level than Kallis's, Kallis's work in India is obviously far superior to Ponting's in India, and Ponting's work in South Africa is definitely compareable to Kallis's in Australia considering the nature of pitches.
How is one supposed to look at their records in the countries you handpicked and come away thinking Kallis is far superior? I myself am considering going to Kallis's side but your argument here doesn't really make a whole lot of sense when Ponting is decisively better in two of the four countries you picked, Kallis greatly better in one and their eecords in each other's home nations is comparable.
just to be clear, I'm in the neutral on Kallis vs Ponting right now, just kind of taken off by the argument.
now regarding Jayawerdene and Sangakkara, Sanga is clearly far superior and I won't really bother debating it.
Showing Sanga and Jaya was not to compare those two. It was to show that Sanga wasn't really producing that great output against good teams and it was not that hard for good SL bastmen to do well at home against good teams. Sanga's get over rated at time by many due to truck load of runs against bottom/minnow teams.
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I have actully thought about the point you are making. You could be bad or good in one venue. Your aggregate performance captures how good or bad you were in those venues taken together. You are not getting extra points for one opposition and you are not penalized for being poor against one. Your bad and good, everything is included there. Ponting could have compensated for doing poorly in India by hitting it out of the park in other venues, but he did not do it.
To make my point more obvious by putting an absurd example,
Batmen A can avg: 50, 50, 50, 50 in 4 venues'
Batsmen B can avg: 52, 52,48, 2 in 4 venues
Chelcklist like you are using will show that hey one was better in 2 and another was superior in 2 so it's a wash. I don't think it's a wash. If it's a real wash then we should be able to see aggregate avg close for all venues taken together for batsman A and B.
Other things being equal, if I don't know the conditions, I will pick a batsman who is not likely ot fail anywhere. As you pointed out, other things were more closer except India. Aggregate avg does the same job. It tells us that Punter must have done poorly in 1 or 2 venues to not have average of 40. It tells us that without looking at break up of his avg in all venues.