Is there a difference?

What’s the difference in *actions*, and in *performance* betweenA)     Do X beginning at 2:00 for an hour durationB)      Do X beginning at 2:00 for and ending at 3:00C)      Do X for an hour ending at 3:00All are possible using the VTODO data structure.One (C) is not allowed if I understand correctlyWithin any interaction, it would be simpler, cleaner to allow only (A) or (B)Do we need to allow both?Does B have a finite stop and A does not?Why would we support both?tc“It is difficult to get a man to understand something, when his salary depends upon his not understanding it” -- Upton Sinclair. Toby Considine
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