Of course, calling the friend would have elicited some truth, as the story of "I went to see X" wouldn't tally with "she wasn't here" - given enough discussion this breaks down.
As it happens, this was exactly how I found about my ex wife's infidelity - she "visited a friend" while I looked after our toddler and built bookcases, but when I asked her what she'd done for two days she cracked totally and her story evaporated.
Within 6 hours of her coming home she'd spilled the beans and our marriage was over.
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Overhead, the Albatross hangs motionless upon the air,
And deep beneath the rolling waves,
In labyrinths of Coral Caves,
The Echo of a distant time
Comes willowing across the sand;
And everthing is Green and Submarine
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