Originally posted by @wolfgang59
Complexity is not an attribute of design.
A pencil is designed but not complex.
A snowflake is complex but not designed.
It seems to me that this argument only works if the word “complexity” is being used in the exact same way for the snowflake as for life, but this is obviously false. There's a clear difference between a snowflake and life that leads many people to conclude that one is designed and the other isn't.
The snowflake exhibits ordered complexity. A snowflake, or ice crystal, is a repetitive arrangement of atoms, and so it's ordered complexity. Think of coding a computer with the instructions to type A B C and D, and then repeat it over and over again. This is highly repetitive complexity. In this case, an ice crystal is just a highly repetitive geometric order, but the complexity we find in life isn't like that at all.
Proteins and DNA are sequence-specific. For example, the sequence of nucleotide bases in the DNA of every living cell is not some random or repetitive arrangement. Instead, the bases are sequence-specific to code for functional proteins, and the laws of physics and chemistry don't determine the sequence. This is called specified complexity.
See this explanation:
https://www.str.org/videos/challenge-response-snowflakes-are-complex-without-a-designer#.WcCPHRNL_zI