1. Suppose you found this plant, and you didn’t know what it was:
2. When the program starts, there are 3221 possible taxa. The first question asks you to count the stamens.
3. Having answered that the plant has five stamens, there are now only 995 possible taxa, and the next question concerns how the flowers are arranged.
4. After stating that the flowers are solitary, only 201 possible taxa remain, and the program asks for the number of stigmas in each flower.
5. After telling the program that there is only one stigma, limiting the options to 76 taxa, it asks the colour of the flowers.
6. Having learnt that the flowers are red, only 6 taxa from three families remain; the next question concerns the arrangement of the leaves.
7. We reply that the leaves are opposite, and only one taxon remains: our plant is Anagallis arvensis, the scarlet pimpernel.