You misunderstand. I never talked about cognitive decline per-se, rather; "a loss of intelligence". Bear in mind, that this is my anecdotal experience and am not stating this as fact. But, you don't really need to look in to the literature to prove or disprove this fact, as who here doesn't get "tunnel vision" on cycle? That is a loss in "plasticity", for lack of a better term. You might not notice it that much, if you weren't broad in your perception in the first place, but even so, you will notice the aforementioned tunnel vision, elevated ego, more aggression, more impulsivity, etc. and all of this will essentially narrow your vision - which is a loss of "flexibility". Aas are very good at doing one thing: making you a brute, with a lower emotional range, who is tough (ie. has lower sensitivity) and able to do "battle" and this is not a heightened state of intelligence, rather, just the opposite.
The lower sensitivity part is interesting, it is not just a matter of not being "phased" by potential sadness, and letting one self go to the decadence of negative emotions (which certainly is needed for the full experience of being a human being), but is also a lack of sensitivity in terms of what you are able to "see" and "feel". As in audio production; if you set your microphone on low sensitivity, because your speaker is very loud, the microphone wont capture the whispering of the person standing next to him. I hope my metaphor is clear; aas lower your sensitivity and this is a loss of perception and emotional flexibility on your behalf. So, this is one of the ways, of which I had in mind, with the loss of intelligence. I could go on and on for pages on end, describing all the loss of intelligence
@Monkipalo that I had in mind when I wrote in my OP, that the loss of intelligence was unbearable, but I hope this is enough. It's my bed time, and I'm writing this with half of my brain shut down. If any juiced up monkey on this forum thinks aas are making them more intelligent, then more power to them (not saying this is you by all means), at that point I certainly wont argue with you.
Cognitive decline, however, IMO could (and probably does) occur to an extent, due to higher levels of stress - via constant HP axis activation, neuroinflammation, etc. - that high androgen loads, especially over a prolonged period of time, tend to cause. I certainly doubt cognitive decline happens, to any meaningful level, on your normal 8 to 16 month cycles. But being constantly ON, blasting and cruising, years on end, I really, ... really doubt, that any neuroscientist wouldn't paint that as unhealthy to the brain. I have yet to speak to such a person and be impressed with his level of cognition.
Off course, it's safe to say that statistically, majority of aas using population aren't the brightest peas in the pond in the first place, so there is that. I have yet to see a philosopher, an artist, a poet, a theoretical physicist, etc. on aas. You can be an empiricist and still function ok on aas, you haven't lost much as you weren't using more then half of your brain in the first place, as again; loss of cognitive abilities in terms of executive function, LTP, etc. probably isn't that big of a deal if you don't have problems in those departments in the first place (and empiricists usually don't, as learning and comprehension is a big proponent of empirical studies), but remembering something from text, a lecture, ... doing studies, drawing some creative parallels and maybe even proposing a new theory is, again, simple, it's just more complex then, for instance, being a mechanic; it's just empirical, factual knowledge.
I'm digressing heavily here. Also, don't really want to turn this log into a discussion about ... well, the direction in which this post and the previous one are pointing. I'll update it soon with new bloods! I'm feeling better, acne are also flaring up, so estrogen is high, which is a good sign in my book, and libido is also getting there slowly, as is the absence of depression.