Hey Russel, welcome to the fray.

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... purposefully or otherwise, does not actually understand what the Theory of Evolution (ToE) actually says.
My opinion is that this condition is common with many people, a product of education that has been neutered to appease christians in general and vocal YEC types in specific. Science doesn't appease opinion, but public pressure pushes school boards to make political decisions.

Another factor is cognitive dissonance, where changing strongly held beliefs are resisted, such as that the earth is young, in spite of worlds of evidence to the contrary. This leads people to become convince that the contradictory evidence is false and that the people presenting it are part of a massive conspiracy to corrupt information, a position that you commonly see among YEC types, but this is not an exclusive reaction. Cognitive dissonance affects everyone with strongly held beliefs.

A third factor, imho, is that logical thinking is not taught, and thus people do not recognize arguments that are fallacies. Thus you have many non-sequitur, ad hominum, arguments from incredulity, straw men, red herring, arguments from authority, and other logical fallacies, and little in the way of arguments supported by evidence and valid logical structure. Again, this condition is not specific with YEC types, but it does seem to be readily apparent in many YEC arguments.

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He did not comment on these experiments and then he makes statements such as those above on this forum which totally ignore this evidence. Is he ignoring the evidence? Did he not understand it?
We can add this to the ever growing list of (contradictory) evidence that remains unanswered

This is also a general pattern with cognitive dissonance, and typically the person will claim that they answered this previously ("scroll up and read"), because - to avoid the conflict caused by the dissonant information - they convince themselves that they have dealt with the issue.

Enjoy.