In the article Lizard attention is drawn to the many characters which make it difficult, if not impossible, to give diagnoses applicable to all lizards and all snakes.
In the following diagnoses of the families preference is given to such characters as are most easily ascertained.
It is true that some specialized forms, such as the Brisingidae among starfish, A strophiura and Ophioteresis among ophiurans, contravene the usual diagnoses; but this neither obscures their systematic position, nor does it alter the fact that since early Palaeozoic times these two great groups of stellate echinoderms have evolved along separate lines.
A professional using a number of different testing approaches diagnoses autism.
It is extremely hard to draw any fixed line in Egypt between magic and medicine; but it is curious to note that simple diagnoses and prescriptions were employed for the more curable diseases, while magical formulae and amulets are reserved for those that are harder to cope with, such as the bites of snakes and the stings of scorpions.