Suppose Mount Everest, also known as Sagarmatha in Nepal and Chomolungma in Tibet, is the world's highest mountain above sea level. It is located in the Mahalangur Himal sub-range of the Himalayas and has a summit elevation of 8,848.86 metres (29,031.7 ft). The first recorded ascent of Mount Everest was in 1953 by Sir Edmund Hillary from New Zealand and Tenzing Norgay, a Nepali Sherpa mountaineer.
Can we infer that "Mount Everest is the tallest mountain in the world"? Yes, no, or maybe?