Bita ya gano ƙirar tushe ba gabaɗaya ta maye gurbin ƙwararrun gine-ginen koyon inji
Bita na takardu 159 na jayayya cewa ƙirar tushen tushen harshe na iya zama gasa sosai a cikin ayyukan da aka zaɓa, amma ba ta sami wata shaida ta faffadan maye gurbin gine-gine ba lokacin da masu bincike kai tsaye suka gwada ko samfuran suna adana da ƙididdige tushen tsarin bayanai.