I'd agree with that. These things are open to interpretation, as you say, and the only way to be sure you've come to the right conclusion is to test your results. Some things are easier to test than others.

[ How does one test the meaning of their Arcana? Of whatever it is about it Crane finds interesting? ]

What data have you been collecting?

[ He said 'combined with every other scrap of data', after all. ]