When the question is genuinely binary — a simple go/no-go — and you want a yes, a no, and the reason behind it.
The one-card yes/no is the oldest quick form — upright for yes, reversed for no, with the card's own image as the reason. Two- and three-card variants are modern conveniences layered on top of it.
Questions that aren't actually yes/no. If your real question is "how" or "why" or "what am I missing," this spread will force a misleading answer.
