The creative process requires different mental properties from its authors. The abilities of observe, compare and explain are the most important of them. In real life it is impossible to find a person who possesses all necessary behaviours. As a result, one person usually cannot fulfil all requirements of solving serious new problem. That is why several individuals with different sets of mental properties participate in each creative process. This fact was first detected by the Ancient Greeks.

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... t was reflected in the set of myths devoted to Cassandra. Some modern explanations of this fact are discussed. We describe several examples of practical skills of authors of novelties needed at the different stages of the creative process. Three main stages of creative process were detected. Special attention was paid for understanding of specific properties of persons connected with the practical implementation of a new idea. Keywords: Definition of the problem, Implementation of the problem solution Personal behaviours, Predictions, Stages of the creative process.