The variable reference is accessible within the transcluded tiddler – the scope is not limited to the tiddler in which the variable is set, but also applies to any transclusions that happen within the $let widget. In other words, if you place this in Tiddler 2:

<<myVariable>>

Then when viewing Tiddler 1, test appears, even though myVariable was not physically defined in Tiddler 2.

This “bleed-over” proves quite useful in many situations, especially ones that involve templates (a concept we'll discuss in the next section).