Retraction in conditions doesn't work as expected

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#1

Basic code completely:

if (aaa and aaa:FindFirstChild("bbb") and aaa.bbb == whatever) then ...

I get an error for bbb is not a child of aaa.

Isn’t Lua suppose to stop at aaa:FindFirstChild(“bbb”)? Logically it should be (true and false and whatever) then retract and set condition to false. It should not try and fill other conditions (this is not efficient as well).
I mean, sure I can open another condition inside the condition but is this how it’s suppose to work or should it be submitted as a bug? Conceptually I don’t understand why would the language keep on trying to fill the conditions if it is already known not all of them would be met + no “or” being presented.

#2

First thing : you can remove () from if
And use this code :

if aaa and aaa:FindFirstChild("bbb") then 
    if aaa.bbb == whatever then
        --what do you want
#3

Yep, it does. I have tested out your code and it works for me with no errors printed. Are you sure the error was from that line?