[BigDisAwesome]

I fully agree with RonD. The only example I could ever think of is very late game where you're pumping out tons of research and you starting researching paths you haven't touched yet. But by that point it wouldn't hurt to go all your points in 1 thing the first turn, all in another the 2nd turn, and all in the other the 3rd turn. If they were more important you wouldn't have waited until that late in the game to research them.