The symptoms of periodontitis are: The gums become red and swollen Spontaneous bleeding, pain, and bad breath Release of pus from the pockets Exposure of the dental necks Loosening of the teeth and, finally, loss of teeth
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I'll take a stab at it: This seems to mean that it is a high order of knowledge to have a sense of the limits of one's knowledge. Being 'smart' and 'informed' or 'savvy' is great, but being aware of...