daagh wrote:
If you look at this from the idiom angle, well perhaps A through D are instant outcasts, for it is never possible to estimate something at some precise thing There is always an element of prediction, speculation, guesstimation, or approximation involved in estimation.
Therefore, 'estimate to be' 'estimate that' are better than 'estimate at'. Estimated at is more in tandem with locations and not with numbers at least.
E then is the sole survivor. But one can rest assured such an open and shut
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