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David remembers the moment he found his elderly stepfather, John, unkempt and suffering from dementia, living alone in an unclean hotel room.

The negative reviews — many invoking rats and unclean kitchens — spoke less to the specific events in Altoona and more to a pervasive frustration.

Disgust is a strong feeling of revulsion in response to objects perceived to be contaminating, polluting or unclean.

“Your policy is dumb,” Farr recalled telling the school, which argued in its response to his lawsuit that his daughter was eating lunch in the girls’ restroom and had unclean hands.

Shortages of water lead to problems for agriculture and health implications as people are forced to use unclean sources, taking the time and energy of children to fetch water, affecting their education, he said.