Re: Re[2]: [tied] Glen, regarding...

>> If a certain segment of a
> > population substitutes a fricative (/f/) for an aspirated
> > stop (/pH/), we can make one of two basic assumptions:
> > that segment finds it difficult (or impossible) to
> > replicate /pH/; or that segment does not properly hear
> > /pH/, and cannot distinguish it from /f/.

Modern English youngsters replace /t/ by the glottal stop, more or less
throughout England now. It has nothing to do with either of your two
suggestions. It is mere fashion - and it is this, the desire to be trendy,
the desire to mark out one's speech group as "different", that drives
language change in many cases.

Peter