I posit that they died spiritually that day. They were not immortal/eternal beings that became mortal in that day.
On the other hand, we are immortal beings. An afterlife awaits us all. Many aspects to explore on this.
Genesis 3:22 NIV
And the Lord God said, “The man has now become like one of us, knowing good and evil.
He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever.”
Luke 20:37-38 NIV
But in the account of the burning bush, even Moses showed that the dead rise,
for he calls the Lord ‘the God of Abraham, and the God of Isaac, and the God of Jacob.’[
a]
38 He is not the God of the dead, but of the living, for to him all are alive.”
John 5:24 NIV
“Very truly I tell you, whoever hears my word and believes him who sent me has eternal life
and will not be judged but has crossed over from death to life.
Ephesians 2:1, 4-5 NIV
As for you, you were dead in your transgressions and sins, ...
4 But because of his great love for us, God, who is rich in mercy,
5 made us alive with Christ even when we were dead in transgressions—
it is by grace you have been saved.
--- ADDENDUM ---
Perhaps this is a back way in to my position that A&E died spiritually that day.
The threat of physical death was meaningless unless they were immortal beings.
However, if the consequences were spiritual death (separation from God) then that fits the plan of salvation better.
Is not our redemption intended to undo the consequences of the Fall? How does that work if the consequence was physical death?
--- SUMMARY STATEMENT ---
I launched this topic with a specific aim in mind. The answer to the topic title question.
But was mostly met with figurative blank stares as respondents seemed puzzled about my conclusion.
The answer seemed obvious to me and I had never really had to prove it to anyone before.
And initially we were bogged down with a definition of physical death.
So, the thread became an exploration of various views on the subject and a fleshing out of my own position.
I needed to provide some biblical evidence to satisfy the skeptics. Okay, fine...
Which proved to be a challenge for me. How could I substantiate what was so clear to me?
It became a discovery process as I searched for evidence. Here's what we discovered.
What sort of life and death are referred to in these passages?
John 5:24 NIV
“Very truly I tell you, whoever hears my word and believes him who sent me has eternal life and will not be judged
but has
crossed over from death to life.
Ephesians 2:1-5 NIV
As for you,
you were dead in your transgressions and sins,
2 in which you used to live when you followed the ways of this world and of the ruler of the kingdom of the air,
the spirit who is now at work in those who are disobedient.
3 All of us also lived among them at one time, gratifying the cravings of our flesh[
a] and following its desires and thoughts.
Like the rest, we were by nature deserving of wrath.
4
But because of his great love for us,
God, who is rich in mercy,
5
made us alive with Christ even when we were dead in transgressions—
it is by grace you have been saved.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
You were dead in your transgressions and sins.
But God made you alive with Christ. (Eph. 2:1-5)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Colossians 2:13-14
When you were dead in your sins and in the uncircumcision of your flesh,
God made you[
a]
alive with Christ. He forgave us all our sins,
14 having canceled the charge of our legal indebtedness, which stood against us
and condemned us; he has taken it away, nailing it to the cross.
John 3:3-8 NIV
Jesus replied, “Very truly I tell you, no one can see the kingdom of God unless they are born again.[
a]”
4 “How can someone be born when they are old?” Nicodemus asked.
“Surely they cannot enter a second time into their mother’s womb to be born!”
5 Jesus answered, “Very truly I tell you,
no one can enter the kingdom of God unless they are born of water and the Spirit.
6
Flesh gives birth to flesh,
but the Spirit[
a]
gives birth to spirit.
7 You should not be surprised at my saying, ‘You[
b] must be born again.’
8 The wind blows wherever it pleases. You hear its sound, but you cannot tell where
it comes from or where it is going.
So it is with everyone born of the Spirit.”[
c]
Revelation 3:1 NIV
“To the angel[
a] of the church in Sardis write:
These are the words of him who holds the seven spirits[
b] of God and the seven stars.
I know your deeds;
you have a reputation of being alive, but you are dead.
Romans 8:9-11 NIV
You, however,
are not in the realm of the flesh but are in the realm of the Spirit,
if indeed the Spirit of God lives in you. And if anyone does not have the Spirit of Christ,
they do not belong to Christ.
10 But if Christ is in you, then
even though your body is subject to death because of sin,
the Spirit gives life[
a] because of righteousness.
11 And if the Spirit of him who raised Jesus from the dead is living in you,
he who raised Christ from the dead will also
give life to your mortal bodies
because of[
b]
his Spirit who lives in you.