Sub-Source Proposition
Definition
A proposition about the genetic contribution of a person, distinct from the material or activity. A contributor proposition concerns whose genetic material is represented. It is distinct from identifying the body fluid or reconstructing the activity by which material arrived.
- Context
- DNA propositions
For example, assessing whether a person contributed DNA is distinct from deciding whether that contribution came from blood or a disputed activity.
A strong contributor-level result does not automatically provide the same evidential support for a disputed activity. Use data and propositions appropriate to the question.
Related terms
- Activity-Level Evaluation
- Evaluation directed at competing accounts of actions, using relevant circumstances and data. An activity question concerns actions, such as direct contact or...
- Likelihood Ratio
- The probability of observations under one specified proposition divided by their probability under another, conditional on the stated information. A likelihood ratio...
- Probabilistic Genotyping
- Software-based interpretation of complex DNA electropherograms using continuous statistical models (e.g. STRmix, TrueAllele, ArmedXpert). Generates a likelihood ratio for complex mixtures previously...
- Transposed Conditional
- The error of confusing the probability of findings under a proposition with that proposition’s probability given the findings. The latter also depends...