That's also true of all things seen. Seeing is just one more kind of evidence, and like all evidence can be misleading.
This affirms that just because one sees a fossil, it does not mean anything in and of itself as far as how it relates to other life, how it got there, when it died, etc... These questions require attempts at piecing clues together and imagination. This is true whether one believe in a young earth or an old earth. You and I can imagine the fish is related to the tetrapod because of seeing the fossil of a lobe-finned fish, but we weren't there to see it alive, and so we either imagine it represents some intermediate form, like Tiktaalik, or that it is a variation of a created
fish kind that God made on day 5.
On the contrary. . . In direct parallel to evolution, we have gravity that we can observe close up, and we have the behavior of distant objects, which we cannot manipulate. We find that the distant objects -- which we cannot manipulate -- behave exactly like we would expect if the same forces were acting on them as we see in objects we can manipulate. We also infer the gravitational behavior of objects on very long time scales -- things like the orbit of Pluto, or long-period comets -- and find that it too looks like the same force is operating as we see locally.
Nobody ever observed a protozoa become a man directly, or indirectly for that matter. What has been observed (directly and appropriately inferred indirectly) is that life will adapt to it's environment (as we would both expect it to since God gave the command to multiply and fill the earth). The earth is not a homogeneous environment, so we'll expect life to diversify, but protozoa do not become people, kind A does not become kind B, invertebrates do not become vertebrates, etc... Another interesting quote by an astronomer, physicist, and cosmologist - who was openly agnostic as far as his religious beliefs go (Robert Jastrow):
"We can assume that in a relatively short time — perhaps within 100 million years — the one celled organism evolved into a colony of cells. With the further passage of time, groups of cells within those colonies assumed specialized functions of food-gathering, digestion, the structural features of an outer skin, and so on; thus began the stage of evolution leading to the complex, many-celled creatures which dominate life today.
The fossil record contains no trace of these preliminary stages in the development of many-celled organisms. The first clues to the existence of relatively advanced forms of life consist of a few barely discernible tracks, presumably made in the primeval slime by soft, wriggling wormlike animals. These are found in rocks about one billion years old. These meager remains are the earliest traces of many-celled animal life on the planet."
Source: Robert Jastrow, Red Giants and White Dwarfs : Man's Descent from the Stars (1971), p. 249 [Emphasis added]
Similarly, we can observe mutation, genetic drift and natural selection operating in real time. When we extrapolate those processes to longer time periods, we find that the actual relationships of different species look exactly like we would expect if the same processes had produced them.
This is exactly what I was illustrating with the Mark Twain quote in post #14. We have a narrowly observed truth here in the present (studying the behavior/function of DNA)... which has never observably resulted in a completely new life form, and extrapolated this mentally to infer that such behavior produced all forms of life from a single-celled organism from billions of years ago. This is akin to the 1.3 million-mile long lower Mississippi that Twain wryly mocked. Again, such large wholesale assertions based on miniscule facts observed in the present.
That's why both gravitation (whose fundamental nature we don't understand at all) and evolution (whose fundamental nature is pretty straightforward) are both parts of science.
No, the overwhelming evidential support comes from genetics, not fossils.
Logical fallacy. Genetics is [1] not available from fossils supposedly 10's or 100's of millions of years old, [2] where genetics is observed in the present, macro evolution is not transpiring, and [3] similarities in DNA is not isolated to one possibility (common ancestry), but is equally possible given a common creator. And since God said this is what He did on days 3, 5, and 6, and it is possible for Him to do this, it should bear credence, though apparently is only a "YEC" view. Since DNA represents a building block God used for creating life, it would make absolutely no sense if DNA was dissimilar among different life forms possessing similar qualities, so logically God would construct the bilateral eyes of, say a fish, using somewhat similar DNA to construct bilateral eyes of, say a human. Whether we're talking about finches in the Galapagos or E.Coli experiments, the result is the same where we have adaptation to the environment, but the finch remains a finch and E.Coli remains E.Coli. Another fitting quote by Robert Jastrow:
"At this moment it seems as though science will never be able to raise the curtain on the mystery of creation. For the scientist who has lived by his faith in the power of reason, the story ends like a bad dream. He has scaled the mountains of ignorance; he is about to conquer the highest peak; as he pulls himself over the final rock, he is greeted by a band of theologians who have been sitting there for centuries."
God and the Astronomers (1978), p. 116; (p. 107 in 1992 edition).
As I stated in post #21 when seeking after truth, science can arrive at some truths, but cannot arrive at all truths as is evident in God's word and what is observably true.