19 of  21

- what is an illusion ?

- [Maturana, 1992, p.2]: "The illusion is always a posteriori. It is afterwards that you say "This was an illusion"... But when you have it, you have it. So illusions, in the moment in which they are lived, are lived exactly the same like perception. But the illusions are experiences of perception disqualified 'a posteriori' through reference to some other experience."

- "afterwards" in sw-engineering:

- we need a new experience that allows sw-engineers to analyse their current experience with reference to it and eventually consider it as illusion;

- I have tried to give material and grounds for constructing this new experience and by means of it, not only disqualify your current experience but also use it as the starting point for developing a new paradigm of sw-engineering.