Blank sin is imageless sin.
Blank choice is imageless choice.
Imageless sin is sin that is an imageless choice.
An imageless choice is one in which the paraphenalia (“tools” [note quotes, which indicate a figure of speech in this case]) involved in choosing are not manifest. This means, for example, that, in effect, a blank mind can communicate both plans of choosing and options. In street language:
It is possible for a blank mind to communicate both plans of choosing and options.
In fifth grade language:
A person can consciously choose even though their mind is blank.