While there was plenty of data to dig into yesterday from the Australian Electoral Commission's annual party funding returns for 2014-15, we're not doing much more than reading the tea leaves on the financial arrangements of the major political parties and their links with donors. As always, we're only getting a part of the story -- and that part requires careful interpretation. Here are the tricks, lurks and loopholes that parties and donors exploit:

The credibility gap between declared income and total income