CTS co-founder @KonstantinPilz on the first problem with pacing the frontier: nobody can measure the pace, and nobody knows how many chips China has. "How do we know if we have pace? Are we slower now than we have been before? It's actually quite hard to define how we're going to measure AI progress. The best way I know of is the Epoch Capabilities Index. It's not perfect, but at least we know one proxy." "On China, we've really dropped the ball thus far. We don't have good models of China,…