Thiel himself, perhaps out of sheer contrarianism, is uncertain about Darwinian evolution.
Although many analysts expect the market for voice services delivered over data networks to grow, the disparate companies that provide such services -- combined with uncertainty about how many people would subscribe -- make the market's evolution uncertain.
The pre-early Pleistocene pathway of the Kuroshio Current is uncertain because tectonic evolution related to the opening of the Okinawa Trough and paleogeography of the Ryukyu Islands have not been well delineated.
Again, the larger and most significant effects are the reduction in the amounts spent when buying second housing for households expecting a large drop in the price of their house or for those being uncertain about the evolution of the value of their home.
However, this method is inappropriate in the context where input sequences are not homologous, too distantly related to produce a reliable phylogenetic tree, or where the phylogeny is uncertain due to concerted evolution.
Although dingoes appear to have evolved from wolves before dogs did, much of their timing and evolution remains uncertain.
However, since most microbial diversity is basically unknown, global numbers and their evolution are uncertain.
The role of recombination, relative to point mutations, in E. coli evolution is uncertain, with different studies and methods producing different rate estimates [13], [60], [61].
There are still many uncertain areas in the evolution and actual function of CNSs.
Long-term prognosis is still uncertain, but when early evolution is favorable, there are usually no late complications.
