⏳➡️🚫🔙

#irreversibility #no going back #past is past #forward only #cannot return

🔥➡️🧊⏳

#second law #entropy #heat flow #irreversibility #arrow of time

☕️➡️🥶

#entropy #second law #heat transfer #irreversibility #arrow of time #spontaneous process

⏰⏪🚫

#cannot rewind #no undo #irreversibility #media control analogy

➡️🔒#️⃣

#one-way hash #cryptographic security #secure hash #irreversibility #pre-image resistance #fixed output