Which makes me wonder if you can apply this as an autodidact. If you know you have made subtle changes, do the results still hold. I&#x27;d guess the answer would be yes but it could be an interesting problem.<p>There also might be a delta (variation of the activity) that optimizes the learning progress. My guess for that would be...change too little and you&#x27;re inefficient, change too much and you are inefficient, too.