In the Talmud Yerushalmi maasrot II mishna 3 it brings an argument between R. Eliezer and the sages if taking truma from a stack of wheat that has not been finished yet makes it into tevel.
[The idea here is that a stack of wheat is usually smoothed down to make it even. So before that final touch is dome one can eat from the stack without taking the gifts of truma and maasar. truma is what goes to the priest and the tithe goes to the Levi. Then there is the second tithe. [All together there is truma, maasar rishon (first tithe), maasar sheni (second tithe), and maasar of the poor.]
So what is being said here is that after one has finished the work on the stack one can not eat of it without first taking all the gifts. [Before that one can eat of it in a casual manner. Not to make a meal of it.]
R Eliezer says taking truma makes the whole stack into tevel and the sages say that it does not. [Tevel means that it is necessary to take all the gifts at that point.]
The Gemara [The Jerusalem Gemara] asks what is the law if the same situation would occur with the tithe? I.e. does taking the first tithe make it into tevel or not?
The Gemara asks what does this question refer to? If before the work was done then obviously not. If after the work was done then obviously yes.
The Gemara answers the case is that the work was not finished, but still he took truma. [That means teh truma was not valid and he has to take truma again after he finishes the work on the stack.] Then he decided that he was not going to do any more work on the stack. So the work is considered to be finished. Then he takes the first tithe. So the Gemara concludes if we go backwards in time then the truma that he took makes it tevel. If we go by "from now on" then the first tithe makes it tevel.
What I claim here is that the Gemar means this: if we go backwards then the truma he already took is valid and so when he takes the first tithe that also is valid. [And perhaps he does not even need to take truma again] But if we go by from now on then clearly the truma he already too dis not valid and the tithe is in a kind of state of limbo. That is it is as if he took tithe on a stack of wheat that has been finalized but the truma was not taken yet. So it is valid but he transgressed a sin because he did not take the tithe in the right order. First truma then maasar.
What kind of question am I trying to answer here? First: how does it make sense to say if after the work was done the maasar makes it tevel? It already is tevel. Also a few more questions I forgot this minute. But at any rate my explanation answers the basic questions on this page.
So what is being said here is that after one has finished the work on the stack one can not eat of it without first taking all the gifts. [Before that one can eat of it in a casual manner. Not to make a meal of it.]
R Eliezer says taking truma makes the whole stack into tevel and the sages say that it does not. [Tevel means that it is necessary to take all the gifts at that point.]
The Gemara [The Jerusalem Gemara] asks what is the law if the same situation would occur with the tithe? I.e. does taking the first tithe make it into tevel or not?
The Gemara asks what does this question refer to? If before the work was done then obviously not. If after the work was done then obviously yes.
The Gemara answers the case is that the work was not finished, but still he took truma. [That means teh truma was not valid and he has to take truma again after he finishes the work on the stack.] Then he decided that he was not going to do any more work on the stack. So the work is considered to be finished. Then he takes the first tithe. So the Gemara concludes if we go backwards in time then the truma that he took makes it tevel. If we go by "from now on" then the first tithe makes it tevel.
What I claim here is that the Gemar means this: if we go backwards then the truma he already took is valid and so when he takes the first tithe that also is valid. [And perhaps he does not even need to take truma again] But if we go by from now on then clearly the truma he already too dis not valid and the tithe is in a kind of state of limbo. That is it is as if he took tithe on a stack of wheat that has been finalized but the truma was not taken yet. So it is valid but he transgressed a sin because he did not take the tithe in the right order. First truma then maasar.
What kind of question am I trying to answer here? First: how does it make sense to say if after the work was done the maasar makes it tevel? It already is tevel. Also a few more questions I forgot this minute. But at any rate my explanation answers the basic questions on this page.