This is hypothetical. You were given the opportunity to provide the tests and the specifications. My only limitations were the things that I observed. I saw a shaped rock that I thought was an arrowhead. You were to provide tests that would allow us to test the validity of my hypothesis. I think I have shown that the hypothesis comes before the tests. You have to see the thing and hypothesize things before you specify the tests. I do not think that functional tests would determine anything since my hypothesis did not include a functional requirement. If you don't like my functional test, then go and specify your own. I did not stop you from doing that. So don't accuse me of things you dream up due to your lack of participation. Answer my blood question, if you want to show that you are interested in discussion rather than "name-calling".
I think I see the problem. This arrowhead exists only in your imagination. Your hypothesis that it is an arrowhead is arbitrary, and it may or may not have any resemblance to anything that is or has ever been an arrowhead. I haven't and am not going to get to see it before I am expected to specify how to test it. Whatever the imagined characteristics of this arrowhead are will change in order to make whatever tests I specify produce apparently erroneous results.