The rationale for vector pops out of thin air

[daizenj]

What Course are you in

cpp4python

What Page were you on
Section 4.3

What is your username
njounkengdaizem

Describe the bug

The rationale for vector pops out of thin air.

Traceback
Section 4.3 > paragraph

[demekenega]

It seems this issue has been resolved because there is no such paragraph in both versions of the book.