# `decide` answers yes, no, or not sure.

`decide` is an if statement that reads. Ask one yes or no question about a text. Jev returns the probability of yes. Your threshold turns it into yes, no, or not sure.

## Run it

*At the default bar of 0.5, three songs are love songs.*

```
is_a_song="The text is the title of a song by the Beatles."
question="$is_a_song It is a love song."

cat <<'EOF' |
She Loves You
Michelle
Yesterday
Taxman
EOF
thinkthen decide "$question" \
  --batch 1 \
  --lines \
  --threshold 0.5 \
  --replay recording
```

*Output*

```
{"input":"She Loves You","value":true}
{"input":"Michelle","value":true}
{"input":"Yesterday","value":true}
{"input":"Taxman","value":false}
```

*exit 0: the run finished*

## Change the bar

*At a bar of 0.6, Yesterday turns to no.*

```
is_a_song="The text is the title of a song by the Beatles."
question="$is_a_song It is a love song."

printf '%s\n' "Yesterday" |
thinkthen decide "$question" \
  --batch 1 \
  --lines \
  --threshold 0.6 \
  --replay recording
```

*Output*

```
{"input":"Yesterday","value":false}
```

*exit 0: the run finished*

## Set a band

*Inside the band 0.3:0.7, Yesterday is not sure.*

```
is_a_song="The text is the title of a song by the Beatles."
question="$is_a_song It is a love song."

cat <<'EOF' |
She Loves You
Michelle
Yesterday
Taxman
EOF
thinkthen decide "$question" \
  --batch 1 \
  --lines \
  --threshold 0.3:0.7 \
  --replay recording
```

*Output*

```
{"input":"She Loves You","value":true}
{"input":"Michelle","value":true}
{"input":"Yesterday","value":null}
{"input":"Taxman","value":false}
```

*exit 0: the run finished*

## The lesson

Yesterday sits between 0.5 and 0.6. A bar of 0.5 calls it yes, and a bar of 0.6 calls it no. The band calls it not sure. The bench has no answer key for this question.

You decide how sure a yes must be.

On GitHub: [github.com/botassembly/beatles-bench/tree/main/examples/decide](https://github.com/botassembly/beatles-bench/tree/main/examples/decide)