They sometimes obtain unclear conclusions about the reason of the performances of the different algorithms (for example, comparing Jiang and Conrath's measure (1997) with Lin's one (1998): "It remains unclear, however, just why it performed so much better than Lin's measure, which is but a different arithmetic combination of the same terms").
the authors emphases on the fact that the use of the sole hyponym relation is insufficient to capture the complexity of meaning: "Nonetheless, it remains a strong intuition that hyponymy is only one part of semantic relatedness; meronymy, such as w h e e l -c a r, is most definitely an indicator of semantic relatedness, and, a fortiori, semantic relatedness can arise from little more than common or stereotypical associations or statistical co-occurrence in real life (for example, p e n g u i n -A n t a r c t i c a ; birthday-candle; sleep-pajamas)".