Relative dating and absolute dating techniques
If the fossils, or the dating of the fossils, could be shown to be inaccurate, all such information would have to be rejected as unsafe.
These skeptics do not provide scientific evidence for their views.
Fossils document the order of appearance of groups and they tell us about some of the amazing plants and animals that died out long ago.
Fossils can also show us how major crises, such as mass extinctions, happened, and how life recovered after them.
This was roughly the dating method used by scientists in the early days of palaeontology and archaeology, before the emergence of absolute radiometric dating methods (radiocarbon, potassium-argon, thermoluminescence, OSL, etc.)The relative dating method is still helpful, since basically it gives reasonably good results.
And not every fossil or archaeological object can be dated, since radiometric dating methods are mostly rather costly, and the financial means of most research teams are limited.