"Pani Hanna: Paweł (lat 8) i Lidia (lat 10) od ponad miesiąca drążą zagadnienie pływania kaczek i co jakiś czas zadają sobie (oraz rodzicom) pytanie: czy da się utopić kaczkę?
Mamy tu pewne intuicje, np. że pewnie trzeba by taką kaczkę najpierw dokładnie umyć lub oskubać (brutalny aspekt zagadnienia pomijamy, to tylko teoretyczna kaczka). Pytanie czy to wszystko?"
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