3 files changed, 3 insertions, 3 deletions
diff --git a/spec/ruby/core/integer/allbits_spec.rb b/spec/ruby/core/integer/allbits_spec.rb
index 11acb52e1f..edce4b15e7 100644
--- a/spec/ruby/core/integer/allbits_spec.rb
+++ b/spec/ruby/core/integer/allbits_spec.rb
@@ -1,7 +1,7 @@
 require_relative '../../spec_helper'
 
 describe "Integer#allbits?" do
-  it "returns true iff all the bits of the argument are set in the receiver" do
+  it "returns true if and only if all the bits of the argument are set in the receiver" do
     42.allbits?(42).should == true
     0b1010_1010.allbits?(0b1000_0010).should == true
     0b1010_1010.allbits?(0b1000_0001).should == false
diff --git a/spec/ruby/core/integer/anybits_spec.rb b/spec/ruby/core/integer/anybits_spec.rb
index 7e510fd00b..e0449074a2 100644
--- a/spec/ruby/core/integer/anybits_spec.rb
+++ b/spec/ruby/core/integer/anybits_spec.rb
@@ -1,7 +1,7 @@
 require_relative '../../spec_helper'
 
 describe "Integer#anybits?" do
-  it "returns true iff all the bits of the argument are set in the receiver" do
+  it "returns true if and only if all the bits of the argument are set in the receiver" do
     42.anybits?(42).should == true
     0b1010_1010.anybits?(0b1000_0010).should == true
     0b1010_1010.anybits?(0b1000_0001).should == true
diff --git a/spec/ruby/core/integer/nobits_spec.rb b/spec/ruby/core/integer/nobits_spec.rb
index b132a4a724..685759ffa3 100644
--- a/spec/ruby/core/integer/nobits_spec.rb
+++ b/spec/ruby/core/integer/nobits_spec.rb
@@ -1,7 +1,7 @@
 require_relative '../../spec_helper'
 
 describe "Integer#nobits?" do
-  it "returns true iff all no bits of the argument are set in the receiver" do
+  it "returns true if and only if all no bits of the argument are set in the receiver" do
     42.nobits?(42).should == false
     0b1010_1010.nobits?(0b1000_0010).should == false
     0b1010_1010.nobits?(0b1000_0001).should == false