I never knew that.
I agree, there is some ambiguity in language designer decisions.
If speculate more and make order is important we may end up with
"1" + 1 => "11"
1 + "1" => 2

>Hi Michael,
>
>>which is implicitly converted to string "11" in mainstream languages now.
>
>Actually, it's implicitly converted to numeric 2 in Oracle PL/SQL. <s>