set category = "Example One"
var/result = "Hello"
world << result
set category = "Example Two"
var/A = 0
Two Tabs with the verbs "One" on each.
You get the tab "Two" with the verb "One" as if the One / One had been completely overwritten.
Addendum: Even if you give the path different names, but use set name="One" it will overwrite the first "One"