# only if sufficient or necessary condition

A sufficient condition is only one of the meansto achieve a particular outcome. For instance: "Apples are the only fruit that John likes." To symbolize these sentences successfully it is usually best to rely on the "rules" associated with each concept. For example: The only way to become rich is to work hard. Learn how your comment data is processed. Now let's take a look at statements with "the only." A sufficient condition is a predicate s (w) such that s (w) is false for all elements in U. For example, to be a good concert pianist, having good finger techniques is a necessary condition. To ask anything, just click here. As I think about the use of “necessary” and “sufficient” in logic, I realize that these are, in a sense, two different senses of what we think of as a “condition” in everyday life, and part of the confusion may be the ambiguity of that ordinary usage. Doctor Mike properly assumes that the book is correct (taking the first clause to be the “condition” for the second, as in my second version), and explains the meaning of the words: He left out two forms that can help clarify (or confuse): $$\text{S} \rightarrow \text{R+R}$$ can be read as “if S, then R+R”, Similarly, “S if R+R” means the same thing as “if R+R, then S”. ATA = 1 The Linear Transformation T (x) = Ax Is One-to-one And Onto From R" To R”. A sufficient condition guarantees the truth of another condition, but is not necessary for that other condition to happen. Thus it is sufficient to know that a number is divisible by 10 -- in order to conclude that it is divisible by 2. We will have a thorough review of "the only" soon! Taking this ethics class is a _____ condition for having peace of mind. In the formula, "If x happens, then y always happens," x is a _____ condition for y. contributing necessary sufficient. Central to this goalwas specifying at least in part the conditions to be met for correctapplication of terms, or under which certain phenomena could truly besaid to be present. A necessary predicate is a predicate n (w) such that n (w) is true for all elements in X. Conditional rules are just like game rules, with events that can be true “only if” something else is true, or “if” something else is true (to name just two examples of signals). A new week is upon us, meaning ample time for more studying! A Is Invertible And A-1 = AT AT Is Orthogonal. —Pable Neruda, Sufficient condition: "You will have the happiest or bitterest hour of your life", Necessary condition: "when you finally find yourself. Consider propositions B and C.‘B is a sufficient condition for C’ means that if B is true, C is always true. 1. Required fields are marked *. The answer is pretty much similar to what we have discussed in the previous section. the word "only" ALWAYS modifies the necessary condition, but "the only" works as sufficient condition indicator because of its typical placement in a sentence. Today I thought we could have some Sufficient & Necessary (S&N) review on "only" statements! Let's look at them one by one. This set of three answers from our archive, each of which is referred to by the next one, look at relationships among the ideas of “necessary and sufficient conditions”, and “if and only if”. It’s easiest to explain the difference between sufficient and necessary conditions through examples. Sufficient conditions. Twitter: @LSATMax. "You will have the happiest or bitterest hour of your life only when you finally find yourself." Now, this does not mean that if you give John any apple, he will necessarily like it. That’s easy to do! Let's begin. Hope that helped rev up your LSAT prep engines! Read the whole thing if you do! Again, let’s think along our weight gain example to reaffirm our understanding. If A is true, we can be sure that B is true. Last Update: 1/27/13 . In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements. Necessary and sufficient conditions is a logical phrase that describes the relationship between two statements when one statement is true if and only if another statement is true. As you know, the word "only" introduces the necessary condition of a S&N statement. Sometimes in math, we trip over words, especially when they are used in ways that differ from everyday usage, or when the associated grammar is complicated. We also offer LSAT test prep online. When I look up “condition” in a dictionary, the relevant definition is “prerequisite”; in the Merriam-Webster dictionary, an example given is “Available oxygen is an essential condition for animal life”. 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