Category Archives: Polemics

Polemics

Can naturalism account for the origin of the 20 amino acids in living systems?

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Do the Miller-Urey experiments simulate the early Earth?
Do the Miller-Urey experiments simulate the early Earth?

The origin of life

There are two problems related to the origin of the first living cell, on naturalism:

  1. The problem of getting the building blocks needed to create life – i.e. the amino acids
  2. The problem of creating the functional sequences of amino acids and proteins that can support the minimal operations of a simple living cell

Normally, I concede the first problem and grant the naturalist all the building blocks he needs. This is because step 2 is impossible. There is no way, on naturalism, to form the sequences of amino acids that will fold up into proteins, and then to form the sequences of proteins that can be used to form everything else in the cell, including the DNA itself. But that’s a topic for a separate post.

Today, let’s take a look at the problems with step 1.

The problem of getting the building blocks of life

Now you may have heard that some scientists managed to spark some gasses to generate most of the 20 amino acids found in living systems. These experiments are called the “Miller-Urey” experiments.

The IDEA center has a nice summary of origin-of-life research that explains a few of the main problems with step 1.

Miler and Urey used the wrong gasses:

Miller’s experiment requires a reducing methane and ammonia atmosphere,11, 12 however geochemical evidence says the atmosphere was hydrogen, water, and carbon dioxide (non-reducing).15, 16 The only amino acid produced in a such an atmosphere is glycine (and only when the hydrogen content is unreasonably high), and could not form the necessary building blocks of life.11

Miller and Urey didn’t account for UV of molecular instability:

Not only would UV radiation destroy any molecules that were made, but their own short lifespans would also greatly limit their numbers. For example, at 100ºC (boiling point of water), the half lives of the nucleic acids Adenine and Guanine are 1 year, uracil is 12 years, and cytozine is 19 days20 (nucleic acids and other important proteins such as chlorophyll and hemoglobin have never been synthesized in origin-of-life type experiments19).

Miller and Urey didn’t account for molecular oxygen:

We all have know ozone in the upper atmosphere protects life from harmful UV radiation. However, ozone is composed of oxygen which is the very gas that Stanley Miller-type experiments avoided, for it prevents the synthesis of organic molecules like the ones obtained from the experiments! Pre-biotic synthesis is in a “damned if you do, damned if you don’t” scenario. The chemistry does not work if there is oxygen because the atmosphere would be non-reducing, but if there is no UV-light-blocking oxygen (i.e. ozone – O3) in the atmosphere, the amino acids would be quickly destroyed by extremely high amounts of UV light (which would have been 100 times stronger than today on the early earth).20, 21, 22 This radiation could destroy methane within a few tens of years,23 and atmospheric ammonia within 30,000 years.15

And there were three other problems too:

At best the processes would likely create a dilute “thin soup,”24 destroyed by meteorite impacts every 10 million years.20, 25 This severely limits the time available to create pre-biotic chemicals and allow for the OOL.

Chemically speaking, life uses only “left-handed” (“L”) amino acids and “right-handed” (“R)” genetic molecules. This is called “chirality,” and any account of the origin of life must somehow explain the origin of chirality. Nearly all chemical reactions produce “racemic” mixtures–mixtures with products that are 50% L and 50% R.

Two more problems are not mentioned in the article. A non-peptide bond anywhere in the chain will ruin the chain. You need around 200 amino acids to make a protein. If any of the bonds is not a peptide bond, the chain will not work in a living system. Additionally, the article does not mention the need for the experimenter to intervene in order to prevent interfering cross-reactions that would prevent the amino acids from forming.

Usually when you hear the origin of life debated, they sort of skirt about the problem of where the amino acids come from, but there is no reason not to make that an issue. The naturalist has to explain how the first living cell could come about naturalistically.

Positive arguments for Christian theism

 

Polemics

Between 1993 and 2013, gun ownership soared, but gun violence declined

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This story is from CNS News. I think it’s important because this is one of those things that everyone thinks they know, yet the facts are completely different from what they think.

It says:

According to data retrieved from the Centers for Disease Control, there were 7 firearm-related homicides for every 100,000 Americans in 1993 (see light blue line in chart). By 2013 (most recent year available), the gun homicide rate had fallen by nearly 50 percent to only 3.6 homicides per 100,000 population.

Here’s the chart:

Gun ownership up, gun violence down
Gun ownership up, gun violence down

More: (links removed)

Based on data from a 2012 Congressional Research Service (CRS) report… the number of privately owned firearms in U.S. increased from about 185 million in 1993 to 357 million in 2013. Adjusted for the U.S. population, the number of guns per American increased from 0.93 per person in 1993 to 1.45 in 2013, which is a 56 percent increase in the number of guns per person that occurred during the same period when gun violence decreased by 49 percent (see new chart below). Of course, that significant correlation doesn’t necessarily imply causation, but it’s logical to believe that those two trends are related. After all, armed citizens frequently prevent crimes from happening, including gun-related homicides, see hundreds of examples here of law-abiding gun owners defending themselves and their families and homes.

It turns out that criminals are rational – if they think that their victims are armed, then they won’t try anything. The only places left where they can go on a shooting spree are gun-free-zones.

Makes you wonder why the Obama administration is so interested in taking the guns of law-abiding people, doesn’t it? Well, when crime goes down, the government can’t meddle as much in our lives, with security cameras, searches, etc. They can only justify taking our freedom away when there is lots of crime. That’s one reason why we should be detering crime ourselves, and vote to keep that right of self-defense.

Learn about the issue

To find the about guns and self-defense, look in the academic literature. Here are two books I really like for that.

Both of those books make the case that permitting law-abiding citizens to own firearms for self-defense reduces rates of gun violence.

Polemics

Does archaeological evidence confirm names, dates and places in the Bible?

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Sherlock Holmes and John Watson: let's take a look at the facts
Sherlock Holmes and John Watson: let’s take a look at the facts

I spotted this post on Be Thinking by UK apologist Peter S. Williams. (H/T Eric Chabot at Think Apologetics)

So let me pick the ones I liked most for this post.

Here’s a good one:

Jerusalem and The Pool of Bethesda

John 5:1-15 describes a pool in Jerusalem, near the Sheep Gate, called Bethesda, surrounded by five covered colonnades. Until the 19th century, there was no evidence outside of John for the existence of this pool and John’s unusual description “caused bible scholars to doubt the reliability of John’s account, but the pool was duly uncovered in the 1930s – with four colonnades around its edges and one across its middle.”[38] Ian Wilson reports: “Exhaustive excavations by Israeli archaeologist Professor Joachim Jeremias have brought to light precisely such a building, still including two huge, deep-cut cisterns, in the environs of Jerusalem’s Crusader Church of St Anne.”[39]

And this one:

Jerusalem and The Pool of Siloam

In the 400s AD, a church was built above a pool attached to Hezekiah’s water tunnel to commemorate the healing of a blind man reported in John 9:1-7. Until recently, this was considered to be the Pool of Siloam from the time of Christ. However, during sewerage works in June 2004 engineers stumbled upon a 1stcentury ritual pool when they uncovered some ancient steps during pipe maintenance near the mouth of Hezekiah’s tunnel. By the summer of 2005, archaeologists had revealed what was “without doubt the missing pool of Siloam.”[40] Mark D. Roberts reports that: “In the plaster of this pool were found coins that establish the date of the pool to the years before and after Jesus. There is little question that this is in fact the pool of Siloam, to which Jesus sent the blind man in John 9.”[41]

I just read this one because I am working my way through John. In case you haven’t read John, you really should it’s my favorite gospel.

Here’s another one:

Herod the Great

We have a bronze coin minted by Herod the Great. On the obverse side (i.e. the bottom) is a tripod and ceremonial bowl with the inscription ‘Herod king’ and the year the coin was struck, ‘year 3’ (of Herod’s reign), or 37 BC.

In 1996 Israeli Professor of Archaeology Ehud Netzer discovered in Masada a piece of broken pottery with an inscription, called an ostracon. This piece had Herod’s name on it and was part of an amphora used for transportation (probably wine), dated to c. 19 BC. The inscription is in Latin and reads, “Herod the Great King of the Jews (or Judea)”, the first such that mentions the full title of King Herod.

Herodium is a man-made mountain in the Judean wilderness rising over 2,475 feet above sea level. In 23 BC Herod the Great built a palace fortress here on top of a natural hill. Seven stories of living rooms, storage areas, cisterns, a bathhouse, and a courtyard filled with bushes and flowering plants were constructed. The whole complex was surrounded and partly buried by a sloping fill of earth and gravel. Herod’s tomb and sarcophagus were discovered at the base of Herodium by archaeologist Ehud Netzer in 2007.

And one more:

The ‘James, son of Joseph, brother of Jesus’ Ossuary

James, the brother of Jesus, was martyred in AD 62. A mid-1st century AD chalk ossuary discovered in 2002 bears the inscription “James, son of Joseph, brother of Jesus” ( ‘Ya’akov bar Yosef akhui di Yeshua’). Historian Paul L. Maier states that“there is strong (though not absolutely conclusive) evidence that, yes, the ossuary and its inscription are not only authentic, but that the inscribed names are the New Testament personalities.“[68] New Testament scholar Ben Witherington states that:“If, as seems probable, the ossuary found in the vicinity of Jerusalem and dated to about AD 63 is indeed the burial box of James, the brother of Jesus, this inscription is the most important extra-biblical evidence of its kind.”[69] According to Hershel Shanks, editor in chief of the Biblical Archaeological Review: “this box is [more] likely the ossuary of James, the brother of Jesus of Nazareth, than not. In my opinion … it is likely that this inscription does mention the James and Joseph and Jesus of the New Testament.”

And finally one short one:

Tiberius Caesar

The Denarius coin, 14-37 AD, is commonly referred to as the ‘Tribute Penny’ from the Bible. The coin shows a portrait of Tiberius Caesar. Craig L. Blomberg comments: “Jesus’ famous saying about giving to Caesar what was his and to God what his (Mark 12:17 and parallels) makes even more sense when one discovers that most of the Roman coins in use at the time had images of Caesar on them.”[48]

This is a good article to bookmark in case you are ever looking for a quick, searchable reference on archaeology and the Bible. There are many more examples in that post.