On Jan 11, 2014, at 10:08 PM, Chris Muller <[email protected]> wrote:

> the point is that i am always sure about
> things i do, when interacting with my computer. 

That means that you're exceptional Chris!

Like in the exception (and not the rule)


> Undo on Command+L would be of no use except for people pressing
> buttons before thinking.  That needs to be corrected to, "think first,
> THEN press buttons."  :)


Which goes in front collision course with the usability principle "Don't make 
me think" for designing great user interfaces

If smalltalk is an environment where experimenting is extremely cheap and 
feedback is instant, there is not reason to overload the neocortex of the user 
forcing her to always be sure (in anticipation of her key strokes!). If you do 
it, it will be one step in the direction of making an unexperienced user feel 
unsafe or worst excluded from the smalltalk ecosystem (because other ecosystems 
do think in making newcomers feel safe).

BTW, experiments where you aren't completely sure of the outcome are often 
surprising, fun and source of lots of insights, aren't they?

sebastian

o/

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