Whether a specification is sufficient is a question of fact1. The requirements are that any directions given be both clear and complete2. It is assumed that the skilled person is seeking success and not failure3. In some cases, it may not be necessary to give detailed instructions as the skilled person might naturally expect to determine such matters for himself provided he would have no difficulty in so doing4.
Directions must be sufficient for the due execution of the invention throughout the range claimed5, including special directions for special cases if the competent workman is not likely to know these
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