"However, to use one of Benjamin Graham's many useful maxims to investing, we're looking for investments that first ensure the preservation of capital, and second, a reasonable expected investment return."

-- Ryan Fuhrmann, five minutes ago

Benjamin Graham: Speculator
Know what else old Ben liked? Informed speculations. From his seminal work, The Intelligent Investor:

"...It was the speculator who looked out and saw future developments before other people did. But today, if an investor is shrewd or well-advised, he too must have his lookout on the future ... where he rubs elbows with the speculator."

In other words: Speculating is only gambling when it isn't well-informed. That's not the case here. We know that police love these devices. We know that while they may not be completely safe, the TASER (NASDAQ:TASR) tends to save lives, not end them. Accordingly, TASER is beating lawsuits and the SEC is done investigating the company.

And did I mention that TASER's competitors are inept?

To use poker parlance -- you brought Vegas into this debate, remember? -- that's a lot of outs for a pot that equals at least $4.3 billion. The best players in the world have pushed all-in for a lot less. You needn't expose your portfolio to the same risk, of course. (Diversification is a key tenet of successful investing, after all.) But there's a rule to poker that also applies to Rule Breaker investing. Matt Damon as Mike McDermott says it best in seminal poker flick Rounders: "You can't lose what you don't put in the middle. But you can't win much, either."

Still feeling rebellious? Ask us for an all-access pass to Motley Fool Rule Breakers and find out which stocks are helping the portfolio scorch the market's average return, 18% to 7%.Go ahead. It's free for 30 days. All you have to lose is the prospect of richer returns.

Think you're done with the Duel? You're not! Go back and read the other three arguments, and then vote for a winner .

Fool contributor Tim Beyers ' last rebellion involved switching back from Windows to the Mac. That'll do for the next decade or so. Tim didn't own shares in any of the companies mentioned in this story at the time of publication. You can find out what's in his portfolio by checking Tim's Fool profile . The Motley Fool has an ironclad disclosure policy .