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    9. RASHI METHOD: SPREADSHEETS
    BRIEF EXPLANATION: The common denominator of the 3 submethods of the Spreadsheet method is that inferences are made from non textual material. The 3 submethods are as follows:
    • Spreadsheet: Rashi makes inferences of a numerical nature that can be summarized in a traditional spreadsheet
    • Geometric: Rashi clarifies a Biblical text using descriptions of geometric diagrams
    • Fill-ins: Rashi supplies either real-world background material or indicates real-world inferences from a verse. The emphasis here is on the real-world, non-textual nature of the material.
    This examples applies to Rashis Dt21-17a
    URL Reference: (c) http://www.Rashiyomi.com/w34n10.htm
    Brief Summary: The eldest inherits DOUBLE - he inherits his own portion and a special portion made for the eldest.

When Rashi explains a complicated algebraic computation we say that Rashi is using the spreadsheet method. Spreadsheet Rashis have a more complicated flavor than other Rashis because of their algebraic technical nature.

Verse Dt21-17a lays down the requirements for promogeniture: But he shall acknowledge the firstborn son of ...., by giving him a double portion of all that he has; ... Rashi explains: For example if a person's estate has $1,000,000 and he has 3 children then we do as follows: We create a fictitious son so that the person now has 4 children, the 3 actual ones and the fictitious one. Each son inherits one fourth of the estate $250,000. The eldest son inherits both his share of $250,000 and the $250,000 of the fictitious son. Consequently the first born inherits $500,000 while the other 2 actual children inherit $250,000 each. It follows that the aggregate share of the firstborn, $500,000, is twice the $250,000 inherited by each non firstborn.

I have augmented Rashi's explanation with the examples used by the Rambam in Chapter 2 of Inheritances. The reader may wonder why the Rambam made obscure so simple a law. Why not simply let the variable x denote the unknown amount inherited by the non first born son. We see that each real son inherits x while the firstborn inherits 2x. Why not simply say that the firstborn inherits twice the amount of each non firstborn.

The above algebraic approach is simpler for the general case. However Rambam gives a complicated example of a 3 child family where one of the non first born sons had an unnatural birth and is not counted for the share of the firstborn son, but does inherit. The interested reader can look up the Rambam's example in his great code. Thus the less simple method of stating the law was to encompass certain rare cases.

We also brought the two approaches of Rashi and Rambam to illustrate how spreadsheet Rashis can be approached in a variety of manners.


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