必ずしも within this sentence


I was learning about 限らない and encounter this particular sentence.

> 社長の意見が必ずしも正しいとは限らない  
>

I'm pretty sure that the meaning would be  
**_"Manager's opinion is not always right"_**

But if I check the dictionary entry for 必ずしも it means _"not always"._  
How come then 社長の意見が必ずしも正しい means "Manager's opinion is always correct"?




I think that 必ずしも is like 必ず but just used for negative sentences. I am pretty
sure that 必ずしも **must** be used with a negative verb, which inevitably makes
it mean "not always". It is the fact that it is combined with "限らない" that
makes it that way, and not by itself.




I think that 必ずしも is like 必ず but just used for negative sentences. I am pretty
sure that 必ずしも **must** be used with a negative verb, which inevitably makes
it mean "not always". It is the fact that it is combined with "限らない" that
makes it that way, and not by itself.

