Most importantly study hard and if you are to guess, guess the same letter every time! like DDDDDDD; you are bound to get at least one or three right rather than getting them all wrong.

That’s an interesting point, and it raises some important issues relating to test design.

If you’re going to guess on a set of several consecutive questions (say, for example, on questions 1 - 10 of a given section), the likelihood that guessing the same answer choice every time will result in correct answers for some of those consecutive questions increases as the number of consecutive answer choices increases, and increases slightly faster than the likelihood that guessing randomly for each question will result in correct answer choices.

But if you’re going to save the questions you can’t answer until the end of the time for a particular section and then go back and guess on them all at once, you’re probably going to be guessing on mostly non-consecutive questions (say, for example, numbers 1, 3, 4, 8, 10, 16, 17, 20). In this situation, guessing the same answer choice every time is no more likely to get you correct answers than guessing randomly.

How can that be?

The LSAT, like all of the major standardized tests, doesn’t allow a particular answer choice to be used more than a certain number of times in a row. On the LSAT, the upper limit on consecutive answer choices appears to be 4 (it should be noted that there might, in fact, not be a limit at all–if the LSAT’s answer-choice-ordering algorithm is truly random, it might simply be the case that it just hasn’t generated 5 consecutive identical answer choices yet). In a nutshell, all this means is that when you’re going to guess on a set of LSAT questions, the number of questions in the set and whether or not they’re consecutive will both affect your odds of success.

If the answer choices aren’t consecutive, then it doesn’t matter whether you guess the same answer choice every time or not, as long as the guesses you make are random.

But there’s another problem–guessing on large numbers of consecutive questions may increase the likelihood that the “DDDDDDD” strategy will generate correct answer choices, but it makes it impossible to score high on a given section because it can’t generate enough of them (assuming, again, that no more than 4 consecutive answers can use the same answer choice, which seems to be the case on the LSAT).

So the “DDDDDDD” strategy is slightly better than random guessing in the unlikely event that you have many consecutive questions to guess on. Where you have non-consecutive questions to guess on, it’s no better than random guessing. Further, it gets you fewer extra points as you answer more and more questions correctly, because answering more questions correctly leaves fewer questions to guess on.

This is what makes the guessing strategy I described in the original article so great: It works better than random guessing in any situation, and the odds that you’ll get extra points using it actually increase as you answer questions correctly. This works because your poll of the known answer choices becomes more reliable as more answer choices are included in it; even when there aren’t a lot of answer choices to poll, though, the strategy in the article is still a little bit more effective than random guessing or “DDDDDDD” guessing.

I do agree with you, though, on the idea that “guessing” is the wrong way to approach the LSAT (or any standardized test) in general. This is why I insist that people develop the ability to know for certain when they’re right about a question–LSAT-takers have to be aware of the rules and patterns on the test, and have to know that every single question has one definite answer, even if they can’t identify it. Focusing on learning the test’s rules and patterns allows test-takers to approach the majority of questions without guessing, and without having to cope with the uncertainty that the word “guessing” seems to suggest. The guessing strategy I recommended in the article is only to be used to answer the occasional questions that a student has difficulty with. (Not that the rules and patterns don’t apply to every question–they do. But test-takers are human, and under the pressures of test day they can’t be expected to perform flawlessly. For this reason it’s smart to have a backup plan for the questions you can’t figure out, and that’s what the guessing strategies are for.)