I found the reply puzzling.
But already our minds are in overdrive, puzzling over the concept, wondering who's who or why, in a mainly frock-coated world, that vacuum cleaner is standing centre stage.
Private charity or philanthropy as a concept was puzzling to the small number of people we had the opportunity to ask because the state has responsibility for providing education, health care, housing and nutrition.
Epic Empire describes his music as "enthusiastic past and future bass", but that concept is pretty puzzling.
For an ingenious attempt to derive a consistent doctrine from Hume's various (sometimes puzzling) remarks on time and temporal concepts in the Treatise see Baxter (2007); for further useful discussion see Bardon (2007).
A 25-year-old who has known only temporary work, on an individual, performance-driven salary, is going to find the concept of a wage agreement puzzling.
This provided an explanation for many puzzling clinical features and triggered a novel concept in human genetics: the existence of repair/transcription syndromes.
Finally, the AH concept can offer an explanation for some puzzling observations, such as the protective effect of dog ownership on asthma [ 77, 78].
Bowsher et al. (2009) have also described the concept of "runaway" wear, which is a puzzling phenomenon that can result in a 2- to 19-fold increase in wear in prostheses compared to identical bearings (Bowsher et al. 2009).
Furthermore, the concept of emotions is used to explain the puzzling findings on the oversupply of effort in experimental tournaments.
