Perhaps. I did find it curious that you were pointing to our deepest, most automatic instincts as the most "rational" motivations we have
This is a nice point, but I think your claim that there are no rational goals is too reductive. For example let us say I have the non-rational aim of buying my wife some flowers. This would rationally
necessitate that I survive long enough to do so; in this sense I would argue that self-preservation is
a rational aim (in most cases at least; there may be cases, such as suicide, where one can rationally act to attain the non-rational aim of self-destruction, but these would, hopefully, be exceptional cases).
I would go even further and argue that it is, in most cases, we can derive rational to aim to be happy; and even further a rational aim to seek the best outcome. This may well be a semantic argument (you seem to want to define 'rational' in terms of formal logic - ie without any set aims; where as I, and I assume natlegend, want to define 'rational' in behavioural terms - ie containing certain axiomatic aims), but I think your definition is far too narrow.