For the record, that isn't advice. It is the authors (of the book) response to the article writers question of whether doing research for the book has taught h

For the record, that isn't advice. It is the authors (of the book) response to the article writers question of whether doing research for the book has taught her to "think like Holmes". And she isn't saying she is making educated guesses but rather that she isn't able to but has learned not to make snap judgements.