Question: Consider the following languages A ^ { forall } = left { | M text { is a TM that

Consider the following languages
A^{\forall}=\left\{|M\\text{is a TM that accepts all strings of length less than k}\right\}
and
A^{\exists}=\left\{|M\text{ is a TM that accepts some strings of length less than k}\right\}
Note the difference between the languages all strings vs some strings
1)To show a language L is Turing-recognizable, we need to build a TM that behaves as follows:
TM on input w:
The TM accepts if
.
TM rejects or loop if
To show a language L is Turing-recognizable, we need to build a TM that behaves as follows:
TM on input w:
The TM accepts if w\in L.
TM rejects or loop if w
otin L
True
False

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