Suppose Mount Everest is Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The China–Nepal border runs across its summit point. Its elevation is 8,848.86 meters (29,031.7 ft), but this varies slightly due to shifting tectonic plates.
Can we infer that "Mount Everest is the tallest mountain in the world"? Yes, no, or maybe?