I tried it three times and won twice. Are my word choices too obscure for this simple-minded program? This is funny because I'm not a native English speaker, so

I tried it three times and won twice. Are my word choices too obscure for this simple-minded program? This is funny because I'm not a native English speaker, so my vocabulary is limited. (For the record, I won with "cryptology" and "xenophobic". Of course those are in the dictionary now.)