Cat
Cat reliability operates on principles entirely divorced from human expectations. They appear when hungry, disappear when satisfied, and maintain schedules comprehensible only to themselves. Attempts to summon cats prove successful approximately 23 percent of the time, a figure that drops to single digits when veterinary visits impend.
This unreliability extends to output consistency. Some days cats provide enthusiastic companionship; others they acknowledge human existence with barely concealed disdain. Performance depends on variables including weather, lunar phase, and factors known only to the cat itself.
Solar Panel
Solar panels demonstrate reliability that approaches mechanical perfection. When sunlight strikes their surface, they produce electricity. When darkness falls, they cease. This binary operation continues for decades without deviation, interruption, or inexplicable sulking. System uptime typically exceeds 99 percent excluding weather-related variations.
Weather dependency represents the panel's primary reliability limitation. Cloud cover reduces output proportionally, and nighttime eliminates production entirely. These limitations, however, follow predictable patterns amenable to forecasting, unlike feline behaviour which remains fundamentally unknowable.