by Elio & Merry — While phi­los­o­phiz­ing about what is a species, should one laugh or cry? Maybe it mat­ters how you feel at the mo­ment. For me (Elio), that's the case. In my bil­ious mood, I de­spair about the chances for a use­ful, en­com­pass­ing, and con­sen­sual de­f­i­n­i­tion. But when I feel more jovial, I ap­plaud the con­tin­u­ous ef­forts...