[NTG-context] How to avoid overriding a control sequence?

Nicola nvitacolonna at gmail.com
Mon Mar 7 19:40:44 CET 2016

How do I check in ConTeXt whether a control sequence is already
defined (to avoid redefining it by accident)?

Marginally related to the above, I have tried to use \show, only to
discover, to my surprise, that it gives an error. For example:


Does ConTeXt override some of TeX primitives?


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