Suppose In astronomy, a comet is a celestial body that orbits the sun. Comets are made up of ice, dust, and rocks, and they often have a visible tail when they pass close to the sun. Comet Hale-Bopp, discovered in 1995, is one of the most famous comets in recent history due to its bright appearance in the night sky.
Can we infer that "all comets have a visible tail when passing close to the sun"? Yes, no, or maybe?