ABSTRACT
That is a simple and straightforward case where the question was clear, 'What is the cause of my child's spots?' and where the rival answers were clear, 'Measles' and 'No, not measles, but acidity,' and where a decision between the rival answers can be made without much difficulty. Other cases can be far less straightforward, e.g. where the symptoms are not visible but internal, and where the patient
Introductory 11 deal with it better than any of their competitors), although the exact questions which they think it proper to ask when dealing with that subject matter may and do differ from one theory to another. It is, therefore, impossible to avoid controversy over posing the questions; nor could one hope within the limits of this book finally to settle controversy raised. But controversy is desirable; only unreflective prejudice and passive acquiescence are to be avoided.
