[RogorMortis]

Right someone made the mistake of starting a defining thread again and the difficulties of agreeing on something definite.

Here is the Mortis theorem of progressive based on Jerry Lucky's words:

1. Complex arrangements usually featuring intricate keyboard and guitar playing including complex chord progressions
2. Songs predominately on the longish side but structured
3. A mixture of loud and soft passages with various crescendos
4. Symphonic use of Mellotrons or string synths or an orchestra for that matter
5. Use of other musical styles
6. Extended instrumentation solos
7. Multi-movement compositions or multi-sectional compositions created from unrelated musical parts
8 Blending acoustic, electric and electronic instruments into a emotion

Now not all 8 points have to be fulfilled to be progressive - just some of them

Perhaps this makes it easier or even more difficult.....??