1. Physical and mathematical impossibility: In physics and mathematics, some events or states have proved absolutely impossible, such as "putting a perfect infinite cone into a perfect infinite cylinder" (this is impossible because the volume of a cone is larger than that of a circle with the same base).
2. Logical impossibility: Some things are logically impossible, such as "a square has four right angles" (this is impossible because the angle of a square can never be equal to 90 degrees).
3. Historical impossibility: Some events have been proved impossible by history, such as "China invented the telephone in 1 year" (this is impossible because the telephone was invented only in the 20th century).
I hope the above answers are helpful to you.