List of built-in block names? – Snap! Editor – Snap! Forum https://forum.snap.berkeley.edu/t/list-of-built-in-block-names/14213
When you define a custom block the actual block name ("s" attribute of element in the XML) is identical to the visible block name (including a representation of parameters). However for built-in blocks this is not true.…
AFAIK there’s no actual danger with naming a variable LIST.