These activities involve the mastery of the many sub-activities that constitute a complex activity with goals that challenge abilities of the agent.
Nowadays, contemporary art museums worldwide share the same business- and technology-related challenges: ability to attract paying visitors, digitalization of their exhibits and the number of objects in their archives.
Complex scientific theories are sometimes enigmatically dispatched in parenthetical asides, and even the longer "simple" explanations are, alas, often beyond my scientifically challenged abilities.
This extraordinarily rapid rate of change will challenge the ability of many species to adapt.
What I choose to do has to challenge my ability to conceive of and fabricate objects.
"Terrorism can kill a lot of people, but it can't fundamentally challenge the ability of the nation to exist.
The women's national team was not a full-time job, and playing in a women's professional league in Canada did not fully challenge her ability.
Across the UK there are home-grown slopes to challenge every ability, from the stunning resorts of the Scottish Highlands to the pistes of England's Pennine folds.
Such deviations from ideal DFIT behavior challenge our ability to estimate formation properties reliably.
Severely comminuted metaphyseal fractures challenge the ability of standard implants to provide adequate stability.
