Where does the last piece go?

Who I am?

I am who I am,
If I�m not who I am,
Then I must be someone else,
If I�m someone else,
I cannot be myself,
Only I know who I am
Anyone else don�t really know who I am
They could know a little bit
But not to the extend of how much I now myself,

If they know more about myself than I am,
Then they are not themselves,
If they are me and they are not themselves who are they?
If they are me then who am I?

Here�s the logic and the code (learnt it when I was small also� ha ha)
{
I = I
{
If I =! I; Then I = S; else I = S;
}
{
If I =! I;
{
Conditional :
{
I =! Me;
I + Me = I;
}

{
S + Me =! I;
S + Me < I + Me
}

If S + Me > I; Then S + Me =! Me;
If (S + Me = Me) && (S + Me =! S + Me);
{
S + Me = answer1
If S + Me = I;
I = answer2;
}

Print answer1;
Print answer2;

End
}