E kore e free rangahau, ka ko te herenga tūturu tenei.
Na tawhiti, kua arotakehia poto ahau te katoa anga hapa rangahau, i te mea ano te tumu parau o maimoatanga roa pukapuka (Weisberg 2005; Groves et al. 2009) . Ahakoa he matawhānui tenei anga, te reira te tikanga ai kairangahau ki te waiho i roto i te take nui: utu. Ahakoa-utu e taea ana te ruri e rānei te wā ranei moni-te uaua āta kōrero e kairangahau mātauranga, he mea he herenga tino e tau'a ore tatou i to tatou tata. I roto i te meka, te tauira kairangahau take uiui o te iwi, nui atu i te taupori katoa ko ki te whakaora moni. Ko te kupu, he faufaa ki te tukanga o te rangahau rangahau utu (Groves 2004) . E kore te mea tonu te lī'oa kotahi-ngakau ki te hapa whakaiti i utu tino tukunoa'i i roto i to tatou anaanatae pai.
E whakaahua nga whāititanga o te pokenga ki te hapa whakaiti i te ako rohe o Scott Keeter me hoa (2000) i runga i te pānga o ngā mahi mara utu i roto i te tikanga ki te whakaiti i whakautu-kore i roto i te rangahau waea. rere Keeter me hoa e rua rangahau tukutahi, kotahi te whakamahi i "Standard" tukanga me tetahi te whakamahi i "pakari" tukanga. Ahakoa i te "pakari" tukanga whakaputa i te auau o raro o te whakautu-kore, he tata i te tauira e rua waiwai te taua. Heoi, utu i te "pakari" tukanga pakeke ka takiruatia te ka tangohia ana 8 nga wa rite te roa. He pai atu ki 2 rangahau whaitake 1 rangahau mä ranei matou? He aha e pā ana ki 10 rangahau whaitake 1 rangahau mä ranei? He aha e pā ana ki 100 rangahau whaitake 1 rangahau mä ranei? I te tahi vahi me tami painga utu nuinga ki, āwangawanga kore-motuhake e pā ana ki te kounga.
E rave rahi o te whai wāhitanga i hanga e te ao mamati kore e pā ana ki te hanga tata e mārama i hapa raro. Engari, ko enei whai wāhitanga e pā ana ki te hanga tata iti me te tere, engari pea me hapa e te hunga teitei wā uaua ki te ine ranei. tokomaha o nga tauira i roto i tenei pene rite ka whakaatu, e haere kairangahau e tohe i runga i te pokenga kotahi-ngakau ki te hapa whakaiti i te utu o te tahi atu āhuatanga o te kounga ki te mahue i roto i runga i ngā whai wāhitanga whakaongaonga. Homai tenei whakamārama e pā ana ki te katoa anga hapa rangahau, ka inaianei tahuri tatou ki te toru ngā wāhanga matua o te toru o nga wā o te rangahau rangahau: huarahi hou ki te kanohi (Tekiona 3.4), ki te huarahi hou inenga (Tekiona 3.5), me ngā rautaki hou mō te whakakotahi rangahau ki ngā tohu mamati (Wāhanga 3.6).