Part II
There are several reasons why they (not sure on the word "they"? who do you mean?) claim that the Eskimos do not necessarily have lots of different words for snow. First, many snow terms just describe phenomena related to snow such as ice and does not mean “snow” itself. Next, many of them are derived from non-snow terms and are used metaphorically. Another crucial reason is the fact that, although some of these terms are a part of any Inupiaq (do you mean Inuit's?) speaker’s vocabulary, others are likely to be known only by elders and particularly hunters.