[Tutor] List exercise

[alan.gauld@bt.com]

> tutorials (change objects to subjects :-). It's their way to 
> give examples with pitfalls. When you want to show something clearly you 
> possibly end description and make an example;  when you want to give a
problem to
> solve, you set up a pitfall. Both together make the learner think s/he has
> missed the clarification.

OK, Interesting point. I now need to revisit my tutor to see if/when I 
fall into that trap. I guess that is a bigger problem with paper books 
since web tutor authors get copious feedback(trust me on this! :-) and 
have opportunity to fix ambiguities progressively. Paper authors have 
to await the print schedules of their publisher - which are driven 
by sales volume not technical accuracy!

Thanks for clarifying,

Alan G