Ainda não temos significados para "infallible touchstone".
1There is, of course, no infallible touchstone by which we can tell offhand.
2Fortunately we have each of us an infallible touchstone by which we can judge of our love of truth.
3No whit disheartened, she turns from one sect to another, trying each by the infallible touchstone of that clear, child-like conscience.
4We shall probably not arrive at any definition which can be applied as an infallible touchstone to distinguish the dramatic from the undramatic.
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