indemonstrably en · ADV
Etymology
From indemonstrable + -ly.
Meanings
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(not-comparable) In a way that cannot be demonstrated.
Yet the whole is quiet, self-contained, pure unreflecting epiphany; and this pure epiphany in turn embodies the character and quite unmistakably, though indemonstrably, the destiny which belongs to the character.
2008, Diana Glenn, Dante's Reforming Mission and Women in the Comedy, page 158: