Is the "vestigial organs" argument a form of argument from ignorance?

Logical fallacy.

You're doing it all wrong.

That's not what is termed a vestigial organ, kiddo.

In biology, we term something vestigial when it is obvious and known what the organ USED to do, as seen in other closely-related species, and that organ simply does not perform the function any longer in the species in question.

For example, we know what wisdom teeth, the appendix, and erector pilli do; they just don't function that way in humans any more. They are vestigial in us because they are no longer necessary for the function for which they evolved in the first place.

Vestigial organs are "on the way out" in a species, evolutionarily speaking.

The point of vestigial organs isn't that you can't find a use for them. The point is that you can find the same "organ" in another closely related species with a different use, showing clear steps, ie, the same parts that come from the same tissues, with completely different uses (or maybe non-uses) in different but closely related species..

No.

For example, the genes responsible for "tails" in mammals have been compared to the genome of humans; turns out we have the same "tail" gene set that most other mammals do, ours just evolved a prefix in front of the major part of them that basically tells the embryonic building genes to "ignore this part." Remove that prefix, and humans have tails -- something that happens all naturally to humans now and then.

Yes, you failed again.

Peace.

Yeah, because goosebumps are so useful in humans. (Sarcasm.) In other organisms, getting goosebumps when it's scared would make its fur stand up, causing it to appear larger. Getting them from the cold also raises its fur, trapping in heat.

@cajunagg: And you know how they figured out they were wrong? Through experimentation by other scientists! Remember, the Church retarded the study of the anatomy because it found the idea of ripping apart dead people disrespectful.

Not sure what is supposedly being argued from the claim that there are vestigial organs.

What "use" might we find for male nipples?

I'm not a creationist either, but it is a nice way of turning the tables.

I would say so. But to what organs are you referring to? Appendix aids the immune system(to the second comment), the whale pelvis helps the mating process without which they would not be able to mate, and the human tail bone is used for defecation. Don't believe me, cut it out.

Vestigial organs are actually quite useful.

...Useful in debunking Creationist BS.

Yes it is. Scientists used to think the liver was in charge of pumping blood throughout the body. We are learning new things every day.

Some cases of it can be, but there are some that are just dead giveaways. Tailbones in humans and leg bones in whales do seem a bit obvious.

Besides, if they all had some function then we shouldn't be able to just remove them like we do.