All sequences obtained were consistent within a species although some intro-specific variation was also observed.
Some songs also had brief intros that were not included in the loop.
In this respect what are here termed the intro-versions are much more revealing.
They are further split into introduction (intro) terms and elimination (elim) terms, according to their standard logical classification.
The voice, which enters after the four-bar intro, provides a point of orientation and unity, and is strongly foregrounded.
On the other hand, intro forms must be supplied a type against which to check.
There were intro-versions - what opponents said or wrote to their respective allies (including, for a while, their respective opponents).
The guidelines which we are intro- ducing, the ground rules, could well be changed in the light of experience.
