diff --git a/ch08.asciidoc b/ch08.asciidoc
index daf2f78c..f0ed0ab9 100644
--- a/ch08.asciidoc
+++ b/ch08.asciidoc
@@ -356,7 +356,7 @@ In the simplest terms, mining is the process of hashing the block header repeate
 
 ==== Proof-of-Work Algorithm
 
-A hash algorithm takes an arbitrary-length data input and produces a fixed-length deterministic result, a digital fingerprint of the input. For any specific input, the resulting hash will always be the same and can be easily calculated and verified by anyone implementing the same hash algorithm. The key characteristic of a cryptographic hash algorithm is that it is impossible to find two different inputs that produce the same fingerprint. As a corollary, it is also impossible to select an input in such a way as to produce a desired fingerprint, other than trying random inputs.
+A hash algorithm takes an arbitrary-length data input and produces a fixed-length deterministic result, a digital fingerprint of the input. For any specific input, the resulting hash will always be the same and can be easily calculated and verified by anyone implementing the same hash algorithm. The key characteristic of a cryptographic hash algorithm is that it is virtually impossible to find two different inputs that produce the same fingerprint. As a corollary, it is also virtually impossible to select an input in such a way as to produce a desired fingerprint, other than trying random inputs.
 
 With SHA-256, the output is always 256 bits long, regardless of the size of the input. In the example below, we will use the Python interpreter to calculate the SHA256 hash of the phrase "I am Satoshi Nakamoto".