After a stretch of mental activity that leaves one depressed, or if depressed due to PMS, the method should better work immediately and very obviously. If it only works in a day or two or the immediate improvement is slight, fleeting or questionable, time itself would have caused an improvement (provided, of course, that the person gets enough rest).

Does the default position depend on the person's occupation or usual activities? Can it change in the same individual just by doing the opposite type of activity, such as during a mathematician's artistic activities or during an artist's mathematical activities?

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