If you design the language to be extremely expressive and flexible, giving speakers many possible ways of saying things and expressing nuances, either by having a large root vocabulary with fine shades of meaning
distinguished by different words (Interlingua, Classical Yiklamu),
or by offering many grammatical means of expressing distinctions (Esperanto, Volapuk, Ithkuil), then you can't simultaneously maximize ease of learning.
On the other hand, if you maximize ease of learning via simplicity of grammar and smallness of root vocabulary (as in Toki Pona and to a lesser extent Vorlin) you wind up with a language less flexible and expressive than, say, Esperanto.
https://listserv.brown.edu/archives/cgi-bin/wa?A2=ind0508D&L=AUXLANG&P=R2681&1=AUXLANG&9=A&J=on&d=No+Match%3BMatch%3BMatches&z=4
Jim Henry | 24 Aug 2005
#TokiPona #mention #easy #pona #fasila #sona #anno2005