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Lecture 16

PHILOS 2 Lecture Notes - Lecture 16: Three Steps, Unexpected Hanging Paradox, Reductio Ad Absurdum


Department
Philosophy
Course Code
PHILOS 2
Professor
Sven Bernecker
Lecture
16

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=!"!)
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&#!C")D
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")$"EEEEEE
%  
 #!"""""
& ""#""$
< ""$)1"$!##
"!"$
E. The students cannot know on Thursday evening of the week of the surprise exam
that there will be a surprise exam the following day.
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a. "$!"!""!$#1"!"
# !!$#3!
b. *#$! "F)!$#
Proposed Soluons
:""#)"!! '#"
#"'7<! $# 1"'8""!)G$
"1""! "!" !
2!) 1"
o/#!'7#!! !!""8'?H4@
<!"##$! "! $"!)
o/#!'7#!! !!""8'?4H
<! $# ) "
2+) II4"!"
o/#!'7#!! !!""8'?4J
<! $# 1"
o/#!'7#!! !!""8'J4K
"#)Reinterpreng the Teachers Announcement
"#"!"1""#
""!#!!#L#!,#!"$!##"!"#""!
"#3!
o4""1""! 
"#"3!"$!"#"!$#1
"!""!)1"'
"!"!!1"#3!!""
2#!""""1""
""L#!,
o!"!"""#)###"!#"#)9
o!$"!"L#!,!!"$'$$#
"!"#"'"$#$3!M
'$#!1""
!""!""!"
o!""#)##"$""!"" !$$$
!"!""$!## !
"#)Disallow Reasoning Backwards in Time
"#"""$"F") $!3!$! $
N6"#"3!'"""""#$"
"#,""$!"!""! "#
$"! =" !"$!!$# "
 !! $
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