It is things given to you that have no purpose whatsoever and are merely done to keep a person occupied. You'll be hard-pressed to find anyone who actually enjoys doing things that further no goals, have no purpose, accomplish nothing, particularly a Te leading type. After all, if you want to get down to the socionics fundamentals as you say then here's a basic definition: So doing things that have zero benefit wouldn't exactly be a strong point of any Te leading type, would it? I feel like these things shouldn't have to be explained as it's part of the basic theory, but nuances of phrase can of course be misinterpreted.