How literal is this phrase?

Sample examples at http://tinyurl.com/is-it-lit

rocket science:

Definitions:

  1. # the science or study of rockets and their design
  2. # anything overly complex, detailed or confusing

Examples:

  1. jacket might be called ' the secret of my success ' . This is n't rocket science : he talks about basic business skills like negotiation , time management and creativity .
  2. I ’ d rather do . I know it ’ s not brain surgery or rocket science , but for me it ’ s a privilege to work on a national news
  3. rental yields that suggest they are 50 % or so overvalued . This is not rocket science : with a 4 % yield it takes 25 years to re-pay the value of
  4. you are have a passion for computers and an enquiring mind is most certainly not rocket science , in other words , if you are content to click a mouse , and
  5. ) . I 'm currently writing a project of similar complexity : it is n't rocket science . Neil said , on October 6 th , 2005 at 1 : 55 pm

Step 1: Select the definition of rocket science which occurs most of the times in the above examples. Ignore other definitions.

Definition1 Definition2

Note: Please select the answers below carefully based on the definition which occurs frequently in the examples

Step 3: score of 0-5 for how literal is the use of "science" in the phrase "rocket science"
0 1 2 3 4 5

Please provide any comments in case you want to tell us about your judgement or any other queries/suggestions! Not Mandatory but helpful.