Transcription
I think, by the way, just to give an example, loose fitness functions rather than tight fitness functions, I've started to look at this whole thing more widely.
An average speed camera is a loose fitness function. You're free to exercise judgment. You if you need to go at 55 to overtake a lorry just for 10 seconds, that's fine as long as between these two cameras, on average, you don't get more than 58 mph. That's a loose fitness function, which leaves you free to use discretionary judgment within wide parameters.
A tight fitness function is a fixed speed camera, where if at this moment on the road you're going at 56 mph, you're fined 100 quid, regardless of context.