Oh, and anyone who has both a child and a house pet has surely noticed that the child, exposed to speech, will acquire a human language, whereas the house pet won't, presumably because of some innate different between them.
Ja igaüks, kellel on nii laps kui ka koduloom, on kindlasti märganud, et laps, kes kuuleb rääkimist, omandab mingi inimkeele, aga koduloom mitte, ja seda eeldatavasti mingi kaasasündinud erinevuse tõttu.