Doubt help SAP Library Objects

Question

I don´t understand the next paragraph (help SAP Library)
link sap library
Is there a error? CREF1 to
CREF3?
If it could not be so,why CREF2?
"The effect of the assignment statement is to copy the reference from CREF1 to CREF2. As a result, the reference in CREF3 also points to the object C_COUNTER<1>. No more references point to the object C_COUNTER<2>, and it is automatically deleted by the garbage collection. The internal name C_COUNTER<2> is now free again." 

Answer 1

Hi abapers,
thank you for you attention.
I have debuger the next code:
REPORT  zcu04_prueba.
CLASS counter DEFINITION.
PUBLIC SECTION.
  DATA A TYPE I.
  METHODS: increment.
ENDCLASS.
CLASS counter IMPLEMENTATION.
METHOD increment.
   A = A + 1.
ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
DATA: cref1  TYPE REF TO counter,
           cref2  TYPE REF TO counter,
           cref3  LIKE cref1.
1º):
cref1 = 0<>
cref2 = 0<>
cref3 = 0<>
CREATE OBJECT: cref1, cref2.
2º):
cref1 = 9
MOVE cref2 TO cref3.
3º):
cref1 = 9
CLEAR cref2.
4º):
cref1 = 9
cref3 = cref1.
4º):
cref1 = 9
http://help.sap.com/saphelp_nw70/helpdata/en/73/f6b832b3fd11d194f20000e8353423/content.htm
I don´t understand the next sentence (help SAP Library)
The effect of the assignment statement is to copy the reference from CREF1 to CREF2. As a result, the reference in CREF3 also points to the object C_COUNTER<1>. No more references point to the object C_COUNTER<2>, and it is automatically deleted by the garbage collection. The internal name C_COUNTER<2> is now free again."
I don´t understand. I think that the sentence:
"The effect of the assignment statement is to copy the reference from CREF1 to CREF3  is the correct. 
Why it is no correct?
Thanks.
Cordial greetings