In search of perfection

The search for perfection.

John Harris: The only traits it would be morally problematic to induce are those that would be harmful to the individual or to others. It wouldn't be morally problematic if a woman had a boy rather than a girl, or a child with a particular skin or eye colour or high intelligence. No one has a reason to bemoan the birth of such a child. Nor would the child have grounds for complaint. On the othe...

Perfection in Abstract Argumentation1

It is a well-known fact that stable semantics might not provide any extensions for some given abstract argumentation framework. Arguably such frameworks might be considered futile, at least with respect to stable semantics. We propagate σ -perfection stating that for a given argumentation graph all induced subgraphs provide σ -extensions. We discuss perfection and conditions for popular abstrac...

Perfection thickness of graphs

We determine the order of growth of the worst-case number of perfect subgraphs needed to cover an n-vertex graph.

Regenerating Perfection.

Review AID in antibody perfection

Expressed immunoglobulin (Ig) genes undergo alterations in sequence and genomic structure in order to optimize antibody function.A singleB cellspecific factor, activation-induced deaminase (AID), initiates these changes by deamination of cytosine to uracil. Uracil in DNA is encountered commonly, and conserved pathways are responsible for its faithful repair.However, at the Ig loci of B cells,AI...