What I mean is to show me from some verses that I as a non Sikh can be convinced that the sikh scriptures are true and that I should follow them as I did in my thread Creation in Islam. I don't know what u mean by the heuristics, but was quoting something from the link which was a Sikh web site. I don't think u or I have have time to prove all the Sikh scripture. If u convince me of a few verses from it that will be a start.
The Sikh scriptures are as vast as any other religion's scriptures. I can definitely help find some verses if you give me what are you trying to find. The verses range from praising God, how to live meaningful life, how to meditate, shun useless superstitious practices, basic principles of living a Sikh life, etc. There is mention of about universe and planetary creation, but please remember we are not talking about a text book of Astronomy or Science, we are talking about Sikh religious scripture which is mainly devoted towards teaching how to live a meaningful Sikh life.
I don't know what u mean by the heuristics
Some people try to analyze ancient (and other) scriptures by investigating each word separately and deriving individual conclusions and them combine those conclusions to arrive at a final conclusion. This kind of practice often leads to a totally different (and most of the times, wrong) conclusion. My favorite example is a 3rd grade story of five blind persons that I studied while I was in elementary school. It is a story of five blind persons who were walking in a jungle and came across an elephant. Having never came across an elephant, they tried to feel it by hand. First blind person got hold of elephant's ear and declared Elephant to be a huge fan, the second blind person got hold of elephant's legs and declared Elephant to be a pillar of a building, the third blind person got hold of elephant's tail and declared Elephant to be a rope, and so on.
As you can see, in the absence of an holistic (Whole and not piecemeal) approach, people usually arrive at different (and often wrong) conclusion.
Regards.