Question: Who stated the twins objection (that with close birth times, personal outcomes can be very different)?
About the article "Astrology", section "Ancient objections".

Candidate passages:
Cicero stated the twins objection (that with close birth times, personal outcomes can be very different), later developed by Saint Augustine.
He argued that since the other planets are much more distant from the earth than the moon, they could have only very tiny influence compared to the moon's.
He also argued that if astrology explains everything about a person's fate, then it wrongly ignores the visible effect of inherited ability and parenting, changes in health worked by medicine, or the effects of the weather on people.
Plotinus argued that since the fixed stars are much more distant than the planets, it is laughable to imagine the planets' effect on mankind should depend on their position with respect to the zodiac.
He also argues that the interpretation of the moon's conjunction with a planet as good when the moon is full, but bad when the moon is waning, is clearly wrong, as from the moon's point of view, half of her surface is always in sunlight; and from the planet's point of view, waning should be better, as then the planet sees some light from the moon, but when the moon is full to us, it is dark, and therefore bad, on the side facing the planet.
Favorinus argued that it was absurd to imagine that stars and planets would affect human bodies in the same way as they affect the tides, and equally absurd that small motions in the heavens cause large changes in people's fates.
Sextus Empiricus argued that it was absurd to link human attributes with myths about the signs of the zodiac.
Carneades argued that belief in fate denies free will and morality; that people born at different times can all die in the same accident or battle; and that contrary to uniform influences from the stars, tribes and cultures are all different.
Monozygotic twins are genetically nearly identical and they are always the same sex unless there has been a mutation during development.
The children of monozygotic twins test genetically as half-siblings (or full siblings, if a pair of monozygotic twins reproduces with another pair or with the same person), rather than first cousins.
Identical twins do not have the same fingerprints, due to the fact that even in a small space inside the womb, people have contact with different parts of this environment, which gives small variations in the same digital, making them unique.
Monozygotic twins always have different phenotypes.
Normally due to an environmental factor or the deactivation of different X chromosomes in female monozygotic twins, and in some extremely rare cases, due to aneuploidy, twins may express different sexual phenotypes, normally from an XXY Klinefelter syndrome zygote splitting unevenly.
Despite being genetically very similar, monozygotic twins are not genetically the same.
A study of 92 pairs of monozygotic twins, carried out in November 2012, provided evidence that monozygotic twins acquire hundreds of genetic differences very early in fetal development, due to mutations (or copy errors) taking place in the DNA of each twin after the splitting of the embryo.
It is estimated that, on average, a set of monozygotic twins will have about 360 genetic differences that occurred very early in fetal development.
These genetic differences that occur very early in fetal development will be present in nearly every cell in the body.
Genetic differences due to mutations can also occur later in life, but those that occur at a later stage will be present in a much smaller proportion of body cells.
Another cause of difference between monozygotic twins is epigenetic modification, caused by differing environmental influences throughout their lives.
Epigenetics refers to the level of activity of any particular gene.
A gene may become switched on, switched off, or could become partially switched on or off in an individual.
This epigenetic modification is triggered by environmental events.
Monozygotic twins can have markedly different epigenetic profiles.
A study of 80 pairs of monozygotic twins ranging in age from three to 74 showed that the youngest twins have relatively few epigenetic differences.
The number of epigenetic differences increases with age.
Fifty-year-old twins had over three times the epigenetic difference of three-year-old twins.
Twins who had spent their lives apart (such as those adopted by two different sets of parents at birth) had the greatest difference.
However, certain characteristics become more alike as twins age, such as IQ and personality.
This phenomenon illustrates the influence of genetics in many aspects of human characteristics and behavior. 
It is now generally accepted that SLI is a strongly genetic disorder.
The best evidence comes from studies of twins.
Two twins growing up together are exposed to the same home environment, yet may differ radically in their language skills.
Such different outcomes are, however, seen almost exclusively in fraternal (non-identical) twins, who are genetically different.
Identical twins share the same genes and tend to be much more similar in language ability.
There can be some variation in the severity and persistence of SLI in identical twins, indicating that environmental factors affect the course of disorder, but it is unusual to find a child with SLI who has an identical twin with normal language.SLI is not usually caused by a mutation in a single gene.
Current evidence suggests that there are many different genes that can influence language learning, and SLI results when a child inherits a particularly detrimental combination of risk factors, each of which may have only a small effect.
Only a handful of non-genetic factors have been found selectively to impact on language development in children.
Later-born children in large families are at greater risk than earlier born. 
  Type of breech presentation – the frank breech has the most favorable outcomes in vaginal birth, with many studies suggesting no difference in outcome compared to head down babies.
(Some studies, however, find that planned caesarean sections for all breech babies improve outcome.
The difference may rest in part on the skill of the doctors who delivered babies in different studies.)
Complete breech presentation is the next most favorable position, but these babies sometimes shift and become footling breeches during labour.
Footling and kneeling breeches have a higher risk of cord prolapse and head entrapment.
Parity – Parity refers to the number of times a woman has given birth before.
If a woman has given birth vaginally, her pelvis has "proven" it is big enough to allow a baby of that baby's size to pass through it.
However, a head-down baby's head often molds (shifts its shape to fit the maternal pelvis) and so may present a smaller diameter than the same-size baby born breech.
Research on the issue has been contradictory as far as whether vaginal breech birth is safer when the mother has given birth before, or not.
Fetal size in relation to maternal pelvic size – If the mother's pelvis is roomy and the baby is not large, this is favorable for vaginal breech delivery.
However, prenatal estimates of the size of the baby and the size of the pelvis are unreliable.
Hyperextension of the fetal head – this can be evaluated with ultrasound.
Less than 5% of breech babies have their heads in the "star-gazing" position, face looking straight upwards and the back of the head resting against the back of the neck.
Caesarean delivery is absolutely necessary, because vaginal birth with the baby's head in this position confers a high risk of spinal cord trauma and death.
Maturity of the baby – Premature babies appear to be at higher risk of complications if delivered vaginally than if delivered by caesarean section.
Progress of labor – A spontaneous, normally progressing, straightforward labor requiring no intervention is a favorable sign.
Second twins – If a first twin is born head down and the second twin is breech, the chances are good that the second twin can have a safe breech birth.
Birth attendant's skill (and experience with breech birth) – The skill of the doctor or midwife and the number of breech births previously assisted is of crucial importance.
Many of the dangers in vaginal birth for breech babies come from mistakes made by birth attendants.  
Fraternal or dizygotic (DZ) twins (also referred to as "non-identical twins", "dissimilar twins", "biovular twins", and, in cases of females, sororal twins) usually occur when two fertilized eggs are implanted in the uterus wall at the same time.
When two eggs are independently fertilized by two different sperm cells, fraternal twins result.
The two eggs, or "ova", form two zygotes, hence the terms "dizygotic" and "biovular".
Fraternal twins are, essentially, two ordinary siblings who happen to be born at the same time, since they arise from two separate eggs fertilized by two separate sperm, just like ordinary siblings.
Instead of fraternal twins, this situation can also occasionally result in a chimera, someone colloquially described as their own fraternal twin.
Dizygotic twins, like any other siblings, have an extremely small chance of having the same chromosome profile.
Even if they happen to have the same chromosome profile, they will always have different genetic material on each chromosome, due to chromosomal crossover during meiosis.
Like any other siblings, dizygotic twins may look similar, particularly given that they are the same age.
However, dizygotic twins may also look very different from each other.
They may be of different sexes or the same sex, just like ordinary siblings.
Studies show that there is a genetic basis for dizygotic twinning.
However, it is only the mother who has any effect on the chances of having such twins; there is no known mechanism for a father to cause the release of more than one ovum.
Dizygotic twinning ranges from six per thousand births in Japan (similar to the rate of monozygotic twins) to 14 and more per thousand in some African countries.
Dizygotic twins are also more common for older mothers, with twinning rates doubling in mothers over the age of 35.
With the advent of technologies and techniques to assist women in getting pregnant, the rate of fraternals has increased markedly.