The division into three different sorts of thinking(Insight Thinking, Sequential Thinking, Strategic Thinking)is by no means a rigid one. The sections overlap to some extent and particulars processes may be found under different headings.
             The basic processes of thinking are common to all sections but certain aspects of thinking are brought out in one section more than in another. The headings are only descriptive of this different emphasis and are not instructions on how to tackle the section.
             INSIGHT THINKING: The steps leading up to the solution are not all apparent. The solution seems to come about by virtue of a sudden jump in thinking. It is more a matter of finding the right approach than of care in pursuing an approach.
             SEQUNTIAL THINKING: The solution follows a progressive sequence of steps (modification, improvement, mistakes, new ideas, etc.). The sequence need not to be a logical sequence; nevertheless, the steps occur one after another.
             STRATEGIES THINKING: This is concerned with the choice of the most appropriate steps out of a multitude of possible steps. The search is not for a definite solution but for a policy of behavior that is more effective than others. .
             Insight problems may, of course, be solved by sequential processes just as sequential problems may be solved in an insight fashion. Both processes may be used in strategic thinking.( (the five day course –Pp.11)
             Thinking is a term we often use but rarely define precisely. Definitions of the verb to think range across a broad array of mental functions from reflection, meditation, and cogitation (suggesting passive reception) to mental actins such as conceptualization and problem solving( implying an active approach). For the purposes of this discussion, thinking is regarded as an active process involving a number of denotable mental operations such as induction, deduction, reasoning, sequencing, classification and definition of relationships...