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Re:Mastering Chess and Shogi by Self-Play with General Reinf... by dragonwriter on Wednesday December 06, 2017 @09:59AM (#15861461)
Yes, it is; while the idiom standing on its own implicitly includes a leading “at least”, it is also idiomatic to use it in exactly the way used by the grandparent post, in an explicit contrast with better, where it comes with an implicit (or sometimes explicit) leading “merely” instead of “at least”.
Re:Mastering Chess and Shogi by Self-Play with General Reinf... by T-hawk on Wednesday December 06, 2017 @11:27AM (#15862345)
It's unnecessary, though, and makes the point harder to read. "It works even better" would be a perfectly sufficient description. "It works not as well as but better" is an unnecessary rhetorical flourish.