In order to understand a sentence, it is necessary to have knowledge both of the constituents and of the particular instance of the form.
It is in this way that a sentence conveys information, since it tells us that certain known objects are related according to a certain known form.
Thus some kind of knowledge of logical forms, though with most people it is not explicit, is involved in all understanding of discourse.
It is the business of philosophical logic to extract this knowledge from its concrete integuments, and to render it explicit and pure.
(Bertrand Russell, Our Knowledge of the External World)

It's only natural that you should feel the same way too...
It's circumstantial, it's nothing written in the sky
And we don't even have to try...
It's circumstantial, it's something I was born to
(Crowded House, It's Only Natural.)