The argument from likeness, though logically less straightforward than the paradeigma, is exactly the sort of analogical reasoning we want when we are unsure about underlying generalizations.
The replication and transcription problems are, at least, logically relatively straightforward, even if hard from the chemical point of view, inasmuch as no new principles, beyond base complementarity, and enzymatic catalysis need to be invented.
Logically, the most straightforward and mostly used approach is to measure in a rectangular grid mapping pixel to pixel and directly creating the image.
A straightforward but logically less interesting possibility is to define implication from conjunction and negation (or disjunction and negation) using the corresponding tautology of classical logic; such implications are called S-implications.
Understanding, logically, how to overcome that particular obstacle is not straightforward, but we believe it lies in a combination of ingenuity, humility and compassion.
However, while cognitive dissonance should logically foster quit attempts, behaviour change is not always straightforward, even when dissonance is high and uncomfortable.
They are not as straightforward as "facts" which can be empirically or logically proven.
From the perspective of conservative moral values, he is making sense and arguing logically, making his moral values clear and coming across as straightforward and authentic, as Reagan did.
