The phrase "actually intelligible" is correct and usable in written English.
It can be used to emphasize that something is understandable or clear, often in contrast to previous assumptions or expectations.
Example: "After reviewing the complex document, I was relieved to find that the main points were actually intelligible."
Alternatives: "truly understandable" or "genuinely clear".
Here "actuality" (actus) means 'that which makes the being actually intelligible, by giving it the actual essence it has.' This movement of conceptual analysis opens the mind to see that we can understand a creature as "a being" (ens) only by referring to the notion of an act of being which is pure from non-being (esse purum), indeed, which is pure from any non-being (esse purissimum).
So too, it seems, the light involved in scientific knowledge is a light that a source apart from the mind, namely God (or possibly an intelligence), sheds on objects of scientific knowledge so as to render them actually intelligible, in the way the light the sun sheds on bodies makes them actually visible.
His murmurs and moans vaguely recall Jim Morrison or Nick Cave, although only odd lines - "As the sun was rising, I look away" - are actually intelligible.
So, too, in the order of consideration although not in the order of reality, the agent intellect separates or frees the quiddity presented in a phantasm from its individuating conditions and thereby reduces it from being potentially intelligible to being actually intelligible and capable of moving the possible intellect to understand.
That relationship is quasi-logical because not just any reason can explain any action only those reasons which actually rationalize (make intelligible) an action can explain it.
I can't really be intelligible about it.
Once upon a time I was an intelligent and intelligible adult.
In many cases it may actually commit us to publicly intelligible values that we take our commitments to embody an aspect that may constrain the manner of our practical deliberation and the way in which we can pursue our commitments (Varga 2011a,b).
Nostalgia for the shah among those who actually remember him is at least intelligible.
Eleven did not change significantly in expression, 4 failed to show an intelligible signal, while the remaining 6 actually increased in expression (Additional file 2).
Albert realises that even 'supposit' ampliates the subject: when we say 'This term supposits for something', what it supposits for need not actually exist, but might be past, future, possible or merely intelligible.
