confused on a simple firewall issue

Hey guys, I'm studying for the CCNA Security exam and I have a simple question about firewall technology.

Stateful firewalls allow internally initiated traffic through the firewall.

Isnt that what the "ip inspect" command does? What's the need for "ip inspect" rules if the firewall is stateful?

This was a pretty dumb question and you guys can disregard it.

I have the answer now.

What is the answer?

I asked one of my co-workers the other day and he told me not get caught up with all the terminology in the studies.

He said when you use ip inspect it pretty much makes the firewall stateful..