premise: How to detect gum disease<br>Learn about the causes of gum disease. The condition actually begins with the deposition of plaque (a slimy substance) around the teeth. Plaque is the media where the harmful bacteria thrive and form colonies.
hypothesis: Gum disease can occur in the mouth, but also on the feet.
reason: Gum disease only occurs in the mouth, and must because it's formed from substances deposited on the teeth.  So my statement is clearly incorrect.  The agent likely is confused by simply concepts of anatomy, and understanding that gums and teeth are only located in the mouth.