rlQuote:But when I mention that something is circumstantial, what I am referring to is that it may be interpreted more than one way.
When I made a half joke about circumstantial evidence, it was never intended to be so much in doubt that reasonable scientists could interpret it more than one way. Let us review circumstantial evidence.
If a robbery/murder is commited and we find your
1fingerprints on a gun
2 the gun has shown a grooves pattern in the barrel that imparts a pattern on a bullet
3 we find such a bullet pattern in the victim
4 We see that you have, in your possession, some of the stolen goods
These are circumstantial pieces of ewvidence but they dont disagree, in fact, they reinforce
each other.
Such is a cae for the stories of A afarensis and A anamensis. We know when they lived by age of sedimentary deposits and ashfalls with zircons to date.
We can see derivative structures that show the "modernization" of morphological features that imply functional development
We can see the trail of the mass of skull and extremity data from hundreds of separate specimens that we can now present these data statistically.
Youre arguing about foot arches , when, if you could look at the laetoli casts that they have at the NY MNH, you could see that the toes (which align in the footprints) and the inferred gait (the A a walked more on the side of its foot with a heel strike first) This is not ape-like and the footprints are certainly those of A afar or anamensis, not human.
If they were human, wheres the tools?, wheres the evidence of culture?
If you were right , circumstantially, your case holds very little evidence, only a mild conjecture that someone "jiggered " with the creation of a foot arch .
I tend to agree that the use of two, totally unrelated specimens , aged at least a million years apart, is sloppy scientific methodology. O also think that evolutionary scientists, when they found out about this, have all pretty much jumped all over the data. After all, Some scientists were looking for the derivation of a structure that shows adaptation for long walking, but they do this by inserting a derived feature.
Id say, "stop it" just lets not jump the starter gun. Rather than push evidence, lets see what comes out of more fossil data." Well, such has happened. Weve got many A afarensis foot bones that show the derived structure of the big toe. Its forward and not acting like a "thumb". The kneecap, although it doesnt show a locked knee, it has a more modern patella .
Quote:We recently also discussed the scandalous 'reconstruction' of Lucy's foot with an arch from H. habilis. I would be interested in your take on that.
I agree. Although, as I said above, I believe that they were "pushing" the clock and subsequently weve gotten new specimens that show much of what they were reconstructing the modern toe and the modern anklebone. I believe that , from specimens and molds Ive seen in Philly, the structure of the "arch", as reconstructed, is a mess. It never should have been done and its an embarrasment . Its an example of where some wag wants to get a publication in NATURE . I would certainly like to see the intermediate structures display themselves either with time or as a "polymorphic " feature (some creatures show an arch and some dont-then the slight advantages are seen with later fossils when they ALL have an arch)
I can say this cause Im no longer in the P or P market, I can be very critical of such data and conclusions, but safe with the understanding that my tenure is not on the line. We have about 40 or 50 "actual "fake" hominids that were presented, bought, then debunked.
Thats why I was carping easrlier that I hope they spend as much time on the environmental and chrono environment of Little Lucy as they do on the bones themselves. IMHO, the contexts of the fossils are half the story. Whenever I read stuff by the entire LEakey clan (all the way from Louis to mary, then Richard) Im always a bit wanting that they hadnt completed their "field work" as well as needed.
Johannson probably, IMHO was one of the first in modern times to contextualize Lucy.