Biconditionality-ish of Epsilon Delta Proof of a Limit? I have known the precise ($\epsilon$, $\delta$) definition of a limit,

$$\lim_{x\rightarrow a} f(x) = L \iff \forall \epsilon>0,\exists\delta>0 : (0<|x-a|<\delta \implies |f(x)-L|<\epsilon)$$

for quite some time, but I've just now questioned whether or not the right side of the implication:

$$\forall \epsilon>0,\exists\delta>0 : (0<|x-a|<\delta \implies |f(x)-L|<\epsilon)$$

Could be put in the form

$$\forall \epsilon>0,\exists\delta>0 : (0<|x-a|<\epsilon \implies |f(x)-L|<\delta)$$

I'm asking this because I questioned whether it was possible in my class, but my instructor told me that wouldn't be correct, and I still don't understand why. From what I understand, this definition is saying that if you have a function $f(x)$, and you'd like to show that the limit exists at a point $x=a$, it is sufficient to show that given any arbitrary wiggle-room size $\epsilon$ about $L$ for $f(x)$, there is a corresponding wiggle-room size $\delta$ about $a$ for $x$, and by corresponding I mean having their boundaries meet up.
But then, given that we are trying to basically find (or show that there is) a $\delta$ for every $\epsilon$, isn't it the same thing to show that for every $\epsilon$ there is a $\delta$ in this case. Clearly, the range for $\epsilon$ and $\delta$ is continuous and related (as one goes to $0$, so does the other).
Could you tell me how and why I'm wrong? Maybe an example of where the the strict definition of a limit holds but my hypothesized reformulated one doesn't?

Perhaps one should be "nice." But I am not. Your version is absolutely, totally wrong. Manipulation will never give anything useful, we need to look at rhe geometry.
For example, let $f(x)=0$ if $x\lt 0$ and $f(x)=1$ if $x\ge 0$.
Let $a=0$ and let $L=3$. Let $\delta=77$. Then for all $\epsilon\gt 0$,  if $|x-a|\lt \epsilon$, then $|f(x)-L|\lt \delta$.  
Remark: Let $f(x)$ be any bounded function, whether continuous or not. Then there will be a $\delta$ that satisfies your condition.
