Try to build sentences. Check them by entering in the box below. As you build, you should see what the main connective is: it's always the last one you put in. If you've entered a non-sentence, you'll get question marks and no main connective.
Start by "fixing" this incorrect sentence (hint):
(Example: Enter '(^x)Bx' and see what you get. Then enter some arbitrary sentences. Then play around a bit...)
The Key Phrase for Topic 10 is "strategy".