Their primary evidence consists of the advanced sewn-plank canoe design, which is used throughout the Polynesian Islands, but is unknown in North America – except for those two tribes.
Bukti utama mereka terdiri dari desain perahu sewn-plank canggih, yang digunakan di seluruh Kepulauan Polinesia, tetapi tidak diketahui di Amerika Utara; kecuali kedua suku tersebut.