I fear the things stated about this "trick" may not be correct.
What I suspect is that the computer adds the science points generated by each of your cities, and when they reach the neccesary sum, the advance is ganied.
So, if this this happens when, say, the 4th city added up his points, the points genreated by the 5th city will be used for the next science advance.
This means that, if you have 1 turn left to research, you can switch the science ladder back, and the advance will still be gained in the next turn, but much later (for example when the 10th city adds up its science points).
You gain more money, that's undisputed, but you traded them for the science points that could be used to start up the next advance.
Waddaya thn'k ?
What I suspect is that the computer adds the science points generated by each of your cities, and when they reach the neccesary sum, the advance is ganied.
So, if this this happens when, say, the 4th city added up his points, the points genreated by the 5th city will be used for the next science advance.
This means that, if you have 1 turn left to research, you can switch the science ladder back, and the advance will still be gained in the next turn, but much later (for example when the 10th city adds up its science points).
You gain more money, that's undisputed, but you traded them for the science points that could be used to start up the next advance.
Waddaya thn'k ?

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