Suppose that two binary (yes-no) qualities are being considered. Often (yes, actually!) I want to express that all four combinations are possible: yes-yes, yes-no, no-yes, no-no. Is there a concise way to convey this?
I don't want to say that the two are independent, because they often are not: merely that no possibilities can be ruled out.
Example: A person is from Party A or Party B, and votes for or against Party A's bill. (The person might be on either side, and could either defect or vote with her party.)
Non-example: A number is negative or not, and the number plus one is negative or not. (The combination "x is not negative, but x+1 is negative" cannot occur.)