## On problem-solving, Volume 58 |

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### Contents

The Solution of Practical Problems I | 1 |

A Protocol of the Radiation Problem | 2 |

Impracticable Solutions | 3 |

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### Common terms and phrases

abcabc actually already altitudes angle-bisectors angles aspect axioms bundles of rays Chapter circumscribed circle co-con common multiple concept concrete conflict element connection crete crucial object definite demand direction divisible by 13 divisor E. G. Boring effect ellipse esophagus example explication fact factors familiar final solution fixedness func functional fixedness functional value given goal ground-consequence relation group experiments healthy tissue heuristic methods inscribed circle inspection intelligible intensity intersect Karl Duncker Maier material mathematical Max Wertheimer means ments occurs original P-group P-model pendulum problem perceptual periment phases possible prime number problem situation problem-solving proof properties proposal proposition protocol psychology radiation prob radiation problem railway platform realization restructuration result Selz signal solu solution-phases solution-process solved sought spatial specific stick straight line structure synthetic evidence take place tetrahedron theorem theory thing thinking thought-material tion triangle tumor whole