The default Academic explanation when they don't know
what to say, and avoid the obvious answer.
"it must have been" "it was probably"
"It is thought to be"
3 ways to say, "We don't know"
when pride won't let you tell the truth
Keep in mind, the people responsible for making these spearheads,
were an average height of 7 to 8 feet tall.
A thousand years from now the Academics will stumble across in a dig of what is left of the Salt Lake Valley, a Kohler Porcelain toilet, they will have no idea what it is but will announce that it is 10,000 years old, and probably of Egyptian origin and thought to be for ceremonial communal drinking purposes in worship to the Egyptian god Kol Lar, but the plastic Evian bottle will completely perplex them but they will likely state that it must have been some type of musical instrument having its origin in Africa.... and thought to be 100,000 years old... Probably.