How literal is this phrase?

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

acid test:

Definitions:

  1. a rigorous or crucial appraisal
  2. $ Any qualitative chemical or metallurgical test which uses acid

Examples:

  1. on the fate of the Acle Straight within weeks . This is seen as an acid test of the Government 's commitment to protecting our most valuable environments ( 3 ) .
  2. such ‘ markers ' whilst being ungodly – even , unconverted – underneath . The acid test of how I am spiritually is not those externals but the character-change worked by Jesus
  3. . They suggest a and having absorbed alcohol is concerned . Wall street is kool-aid acid test life as an in the midst . With ethical problems institute author sells big new
  4. moment for him and I felt he came out of it very well . The acid test was whether the media and press gave it a fair coverage or yet another Tory
  5. are never implemented . Redistribution of central funding from the Church Commissioners will be an acid test . Secondly we have the habit of welcoming our pioneers in such a way as

Step 1: Select the definition of acid test 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 "test" in the phrase "acid test"
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.