Blog: January 2016

Most of these posts were originally posted somewhere else and link to the originals. While this blog is not set up for comments, the original locations generally are, and I welcome comments there. Sorry for the inconvenience.

Link: how to win at Monopoly and lose all your friends

Forwarded by Siderea: How to win at Monopoly and lose all your friends:

Your goal is to play conservatively, lock up more resources, and let the other players lose by attrition. If you want to see these people again, I recommend not gloating, but simply state that you're playing to win, and that it wasn't your idea to play Monopoly in the first place.

Do some research on, and head down to your local gaming shop, where more often than not, you'll find knowledgeable staff and even demo sets for you to try before you buy. It shouldn't be too hard to convince your friends to try something new, especially if you offer to play another round of Monopoly.

The things you learn...

Somebody asked a question on Stack Exchange about batch-converting document reference numbers (like ISBNs but for papers, not just books) to full citations, which sounded like a "simple matter of programming web services", so I did a little poking around. I have a (single) peer-reviewed publication, so I looked up its reference number (DOI) to test with.

That's how I found out that I have two publications. Er, what? Apparently that paper ended up in a book several years later, and apparently the process of doing that calls for neither permission from nor notification to authors. Or at least second-string authors; maybe the lead author was involved. (I wouldn't know; I haven't interacted with him in ages.) It's a paper in computational linguistics; I was just the (main) programmer, not the linguist or the PhD.

Challenges of round doors

There is, apparently, a construction company out there that will build you a house styled on a Hobbit hole. Naturally, an important question arises for Jewish owners of such homes: do you put a mezuzah on a round door, and if so where? The mezuzah is the scroll (containing certain torah passages) in a case that is affixed to your doorpost -- so what exactly is a doorpost?

The door has to open and close, but it seems possible to design one that has only enough straight section to support a super-strong hinge. Relevant questions seem to be: (a) how long a straight section do you need to qualify as a doorpost, and (b) does your doorpost have to go all the way to the ground? (Is it still a "post" if it just kind of floats there?)

(An answer cites sources that a round door does not require a mezuzah.)

Why a burning bush?

Somebody asked on Mi Yodeya: why, of all the miracles God could have worked, did He choose to approach Moshe through a burning bush? I answered mainly from the midrash:

The midrash in Sh'mot Rabbah (2:5) offers some explanations:

  • Why fire? To inspire him with courage so that when he comes to Sinai later he is not afraid of the fire.1

  • Why a thornbush? R' Yehoshua b. Karchah said: to teach that no place is devoid of God's presence, not even a thornbush.

  • R' Eliezer said: just as the thornbush is the lowliest of all trees in the world, so too Israel was lowly and humble in Mitzrayim.

  • R' Yose said: just as the thornbush is the prickliest of all trees and a bird that goes into it does not come out unscathed, so was the slavery in Egypt more grevious before God than all other servitudes in the world.

  • R' Yochanan said: just as the thornbush grows near any water, Israel grew only in virtue of Torah which is called water.

  • R' Pinchas b. Hama ha-kohein said: just as when a man puts his hand into a thorbush he doesn't feel it at first but when he takes it out he is scratched, so too when Israel went into Mitzrayim nobody really perceived them, but when they went out they did so with signs and wonders and battle.

  • R' Nachman b. R' Shmuel b. Nachman said: some trees produce one leaf,2 some two or three, but the thornbush has five. God said to Moshe: "Israel will be redeemed for the sake of Avraham, Yitzchak, Yaakov, and for your sake and the sake of Aharon".

  • Not attributed: the heavenly fire shoots out branches upward, burns but does not consume, and is black in color, while fire used here below does not branch upwards and is red and consumes. Why show Moshe this? Because Moshe had thought that the Egyptians might consume Israel. So God showed him this and said: "just as the thornbush is burning and is not consumed, so the Egyptians will not be able to destroy Israel".

  • Also not attributed: because when God spoke to Moshe, Moshe was at first unwilling to desist from his work, so God therefore showed him this so Moshe would turn his face to see and speak with Him.

I have also read divrei torah that point out that it took a fair bit of attention to notice: noticing a fire is easy, but Moshe had to (a) decide it was important (it's out in the wilderness, so it's not like it's a danger) and (b) look at it long enough to notice that it's not being consumed. Like running after the single sheep from the flock, this shows an attention to small matters that many would ignore. So it might have been a test of sorts. I don't remember a source for this, though.

1 The burning bush was actually on Horeb (Sh'mot 3:1), which is also Mount Sinai.

2 It says leaves, but a tree with a single leaf seems unlikely and I wonder if it's talking about the number of points on its leaves. I'm not a botanist.