The philosophical discussion regarding love logically begins with questions concerning its nature.
This implies that love has a 'nature', a proposition that some may oppose arguing that love is
conceptually irrational, in the sense that it cannot be described in rational or meaningful
propositions. For such critics, who are presenting a metaphysical and epistemological argument,
love may be an ejection of emotions that defy rational examination; on the other hand, some
languages, such as Papuan do not even admit the concept, which negates the possibility of a
philosophical examination. In English, the word 'love', which is derived from Germanic forms of the
Sanskrit lubh (desire), is broadly defined and hence imprecise, which generates first order 
problems of definition and meaning, which are resolved to some extent by the reference to the
Greek terms, eros, philia, and agape.