No, the opposite of a definition is certainly not always true. That would depend on the definitions and the meaning of the opposite.
Not always
Yes
This is not always true.
Not necessarily. If the statement is "All rectangles are polygons", the converse is "All polygons are rectangles." This converse is not true.
no converse is not true
No.
yes it is
Not always
always true
always true
Yes
No. Consider the statement "If I'm alive, then I'm not dead." That statement is true. The converse is "If I'm not dead, then I'm alive.", which is also true.
This is not always true.
No, it is not.
The Answer: NO
No, it must not be true.
Not necessarily. If the statement is "All rectangles are polygons", the converse is "All polygons are rectangles." This converse is not true.