Intending, knowing how, infinitives

Intellectualists tell us that a person who knows how to do something therein knows a proposition. Along with others, they may say that a person who intends to do something intends a proposition. I argue against them. I do so by way of considering ‘know how ——’ and ‘intend ——’ together. When the two are considered together, a realistic conception of human agency can inform the understanding of some infinitives: the argument need not turn on what semanticists have had to say about (what they call) ‘the subjects of infinitival clauses’