What is the meaning of the following sentence?
She knows and lives by what etiquette is as well as any person I know.
In the above statement is the author saying that
all the people he knows including she (his wife) know etiquette
his wife knows etiquette equally well as others/ not only others that I know but my wife also knows etiquette
the first meaning is that the author knows only the people that know etiquette, the second meaning is derogatory for his wife.
EDIT: The above sentence is from Essentail Manners for Men by Peter Post, page 5 as follows:
For thirty years we have lived together, shared children, owned a business together, gone shopping every week together, renovated one house and built another together. She introduced me to two of the passions of my life: Italy and yoga. She knows and lives by what etiquette is as well as any person I know. Certainly she has corrected me more than a few times, and, as much as I hate to say it, she was almost always right- Throughout this book she is referred to as "my wife."