Peace good logic,
Each study and come to their own conclusions and prepare to meet their Lord with whatever they choose and decided to do.But there is nothing wrong about studying and learning together ,like here, with respect and humbleness, at the end
Wise observation. That is why I mentioned the ambiguity of verse and particularly using the word dulūki.
BUT, on the other hand, at the very least, one must respect the rules of the Arabic classic language, or any other language for that matter. And to cite just one example, when verse says two + (wa) 1 = 3, then it's 3 and not two. One should not be deaf to clear discourse, nor twist the meaning that is fundamentally evident. This is, in fact, what traditional exegetes do by indicating that these times of the night include 2 prayers! Muhammad Asad, who translated very well the meaning of the beginning of this verse, couldn't help but mention the 5 prayers in his commentary !. Incidentally, for verse , it should be noted that the other authenticated recitation variant is zulufan (instead of zulaf in the Hafs version), with an equivalent meaning, but in the singular, which then removes any ambiguity.
I also mentioned in my previous comment the ambiguity of the form ʿashiyi, which can designate several time periods; certainly all related to the decrease in luminosity.
Let's continue our effort of understanding, as you rightly mention in your comment.
This term is used three times in connection with two moments of Prayer, in opposition to the beginning of the day (i.e. dawn)
Recite what has been revealed to you from the Writing of your Lord. None can change His words. And you will
find no refuge besides Him. Be patient with those who call upon their Lord in the early morning/ghadati (1) and
aat the latter part of the day/AAashiyyi, seeking His Face.
Therefore endure patiently, for Allah's promise is true. Ask forgiveness for your sin and glorify your Lord
by praise at the latter part of the day/AAashiyyi and at dawn/al-ibkari (2).
Do not drive away those who call upon their Lord in the early morning/ghadati (1) and at the latter part of the day/AAashiyyi.
And (coincidentally?), another term asali is used in place of the word "ʿashiyi" in 3 other passages, in connection with two moments of Prayer
They said "Tales of the ancients which he has had written down and which are dictated to him
at dawn/bukratan (2) and at the end of the day/aseelan!"
When the Qur'an is recited, listen to it attentively and remain silent. Perhaps you will receive mercy.
Remember your Lord within yourself, with humility and in fear, without raising your voice, early in the
mornings/ghuduwwi (1) and at the end of the day/asali, and do not be among the heedless.
Indeed, those who are near your Lord are not too proud to worship Him. They glorify Him and prostrate before
Him.
In houses which Allah has permitted to be raised and wherein His Name is remembered. He is glorified therein
early in the morning/ghuduwwi (1) and at the end of the day/asali. By men whom neither trade nor sale distracts from the
remembrance of Allah.
In conclusion, one can observe that the words ʿashiyi and asali are used in opposition to time with the same words that designate the beginning of the morning (in red and blue below). These two words ʿashiyi and asali are thus, in this context of Prayer, interchangeable.
(1) root ghayn dāl wāw (غ د و) the first part of the day, the early part of the morning, meal at dawn
(2) root bā kāf rā (ب ك ر) beginning of the day