See http://www.slate.com/blogs/lexicon_valley/2013/10/16/piraha_cognitive_anumeracy_in_a_language_without_numbers.html http://www.slate.com/blogs/lexicon_valley

See http://www.slate.com/blogs/lexicon_valley/2013/10/16/piraha_cognitive_anumeracy_in_a_language_without_numbers.html http://www.slate.com/blogs/lexicon_valley/2013/10/16/piraha_... 'Among Pirahã's many peculiarities is an almost complete lack of numeracy, an extremely rare linguistic trait of which there are only a few documented cases. The language contains no words at all for discrete numbers and only three that approximate some notion of quantity—hói, a "small size or amount," hoí, a "somewhat larger size or amount," and baágiso, which can mean either to "cause to come together" or "a bunch."' ... 'We can only count so fast, after all, but the Pirahã appear not to be counting at all—because, well, how could they? Instead, they're employing what Everett calls an "analog estimation strategy," which works well for a few items but breaks down beyond that.'