But the Veil has been astablished, or is being established. Alda's change of character are being established as a side-efffect of her Conduicy.
You can't have a serious story in which solids pass through solids--except that in Time Enough for Love one of the characters sets a glass down on a table and it disappears. Dora the spaceship makes the excuse that the glass was set on one of her 'take-away spots'.
The point is that you can do anything if you provide the reason. In Ellery Queen's Double, Double a character's declaration that he could not provide as he'd hoped for his bride takes on a new significance when we know the whole story. In that case, it's a clue. And in John Dickson Carr's The Cavelier's Cup a character's reticence about his youthful enthusiasms becomes part of the web of evidence.
