Mechanical analog of Deductive Reasoning :
Consider a machine with several parts working interconnectedly in tandem with each other.
If a part of that machine can be replaced by another piece then that piece plays all the roles in the working of the machine – with the others, and as a whole – which the initial part was playing.
E.g. – Flowers have stamen
Rose is a flower
So rose has stamen.
A sentence can be seen as a machine with interconnected parts i.e. words; each playing a certain role, with others, in the production of meaning.