How do ambiguous "duck-rabbit" and "faces-or-vase" pictures illustrate the systemic idea of constructed reality?

One unchanging image yields two valid percepts — proof that the mind actively organises what it sees rather than just receiving it.

Three classic optical figures make the abstract point concrete:

• The duck-rabbit — the same drawing reads as a duck's bill or a rabbit's ears depending on how you organise it.
• The Rubin vase — two black profiles facing each other, or a white vase between them, depending on what you take as figure and what as background.
• A face that flips between expressions or readings.

In every case the stimulus is fixed and the experience flips — so the difference lives in the observer, not the picture. Generalised, this is the constructivist lesson: perception is an act of interpretation. Two people (or two cultures, or you on two different days) can look at the same situation and honestly see different things, because each is constructing it. For critical thinking that's humbling and useful: your reading is a reading.

Tip: If a single picture can hold two truths at once, so can a single situation — which is exactly why multiperspectivity matters.