According to H. there is a lot of confusion with respect to the 'principle of expressibility'. To bring some clarity the author discusses some notions such as 'human thought', 'what can be meant' and 'intention'. H. concludes that the principle is not tenable. Some possible objections against this conclusion are discussed. Continued in A.W.Van Haaften (1976: 'Het 'principle of expressibility', part 2').