But make no mistake about this image. You need ALL the stones when you're building an arch, and you need all the facts when you're building a proof. You omit just one little stone, and the whole arch collapses. Just so with a proof. You can do all sorts of hard work, and get almost everything lined up, but if you're missing one little fact, the whole proof collapses.
Gravity is unforgiving, and so is proof writing.
That may be why proofs are so intimidating for many students. Well, stick around, and I'll share all the helpful hints I have found so far. But it also may help to think about this. Almost strong enough means not strong enough. Image number 3 .