At least 1 full epoch.

It's only a failure when I decide to give up and stop working on it

Don’t quit on us Flash! I value your news posts

In general, I think it is important to assess success and failure regularly in the context of short-term manageable goals, and build the larger vision (and benchmarks for success and failure for that vision) based on the practical results of these short-term goals. Each interation - whether a succe...