doli incapax
Concise Oxford English Dictionary © 2008 Oxford University Press:
doli incapax /ˌdɒlɪ ɪnˈkapaks/
▶adjective Law deemed incapable of forming the intent to commit a crime, especially by reason of age (under ten years old).
– origin L., lit. ‘incapable of evil’.
'doli incapax' also found in these Oxford entries:

