Cat
The domestic cat presents itself as an undeniably tangible entity. It possesses mass, volume, and texture—approximately 4 to 5 kilograms of fur-covered mass that can be weighed, measured, and, when the cat permits, touched. The cat leaves physical evidence of its existence everywhere: hair on dark clothing, scratches on furniture, the occasional deceased rodent placed meaningfully near one's bed. When a cat sits upon your chest at 3 a.m., the weight is empirically verifiable. This tangibility extends to the cat's impact on one's finances, with average annual maintenance costs exceeding 500 pounds.
Dreams
Dreams exist in a state of radical intangibility. They possess no mass, leave no physical residue, and cannot be photographed, weighed, or exhibited to sceptical observers. A dream of flying leaves the dreamer precisely as earthbound as before. The most vivid nightmare produces no actual monsters. Scientists can detect the rapid eye movements and brainwave patterns associated with dreaming, but the dream content itself remains locked within the dreamer's skull, accessible only through unreliable verbal reports. Dreams are, in the strictest sense, events that never happened to people who were unconscious at the time.