category error...
Whoa! Could you try that again?[truly emoticon]
Try what?
Category error - term used by Kant when showing the fallaciousness of the Ontological Proof of the existence of God - confusing an imaginary thing with reality. Now commonly used to describe any error in a fallacious argument when the categories of the things being compared, or related to each other, are not the same. Hence, in hedonism (in one form of it at least - the one that G E Moore refuted), the words desired and desirable are in different categories - the former being descriptive the latter prescriptive.
OK?
cheer
the sunshine warrior
ps. I believe you may be right - unit of length defined by number of waves/frequency of light, whilst the second is defined by the distance travelled. Ah well...